From the field to the farm office. Find clear meanings, practical examples, and the context behind American agriculture.
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Specialty production & sustainability · Nutrient-stewardship framework matching nutrient management to crop needs and site conditions.
In practice: An adviser reviews a fertilizer plan using the four Rs.
A framework guides decisions; it does not supply a universal application rate.
Conservation & land · NRCS program supporting protection of agricultural lands and restoration or protection of wetlands through easements.
In practice: A land trust discusses a working-land easement.
Easements involve long-term property restrictions.
Feed, forage & dairy · Feed-fiber fraction containing mainly cellulose and lignin, used in forage evaluation.
In practice: A hay analysis includes ADF.
Interpret ADF with other feed measures and the laboratory method.
Livestock & genetics · Average body-weight gain per day over a stated period.
In practice: A calf gains 90 lb in 30 days, giving an ADG of 3 lb/day.
Formula: (ending weight − starting weight) / days. Use comparable weighing conditions.
Animal health & biosecurity · Systems and requirements supporting tracing of animals during disease investigations.
In practice: An operation reviews identification rules before interstate movement.
Applicable identification and documentation depend on species and movement.
Crops & pest management · Amount of the parent acid represented by certain herbicide salt or ester formulations.
In practice: An agronomist compares herbicide concentrations on an AE basis.
Acid equivalent and active ingredient quantities can differ.
Farm labor & workplace safety · Wage rate used in the H-2A program to help prevent adverse effects on U.S. worker wages.
In practice: An employer checks the applicable AEWR before preparing a job order.
The required wage can involve other applicable wage standards; no current rate is supplied.
Farm labor & workplace safety · Area around pesticide application equipment subject to specified exclusion requirements during an application.
In practice: An applicator checks current AEZ requirements before spraying.
Dimensions and duties depend on the application and current WPS rules.
Water, irrigation & weather · Volume covering one acre to a depth of one foot.
In practice: A reservoir report describes storage in AF.
Formula: 1 acre-foot = 43,560 cubic feet, approximately 325,851 U.S. gallons.
Conservation & land · Animal operation meeting confinement and vegetation criteria in federal water regulations.
In practice: A producer reviews AFO definitions before evaluating CAFO rules.
AFO status does not by itself establish CAFO status.
Specialty production & sustainability · NIFA competitive grant program supporting agricultural research, education, and extension.
In practice: A university team examines an AFRI funding opportunity.
The official title uses Agriculture and Food.
Farm programs & assistance · Tax income measure used in tax reporting and certain farm-program payment eligibility tests.
In practice: An applicant reviews the AGI certification requested for a farm program.
Program averaging, exclusions, and thresholds require the current instructions.
Crops & pest management · Ingredient in a pesticide product responsible for its pesticidal activity.
In practice: An applicator compares products containing the same AI.
AI also means artificial insemination and artificial intelligence.
Livestock & genetics · Breeding method that places semen in the female reproductive tract without natural mating.
In practice: A herd manager plans an AI breeding schedule.
In crop and technology contexts, AI has other meanings.
Precision agriculture & equipment · Computational methods performing tasks such as pattern recognition, prediction, or decision support.
In practice: A crop-camera system uses AI to classify images.
Validate performance in the actual field conditions and retain human review.
Crop & livestock insurance · Private insurer approved to deliver federal crop insurance under applicable agreements.
In practice: A producer selects an agent working with an AIP.
The agent and the insurance company perform different roles.
Conservation & land · ACEP component helping eligible partners protect agricultural land from nonagricultural conversion.
In practice: A landowner discusses development rights with an eligible partner.
ALE and wetland easements have different purposes.
Conservation & land · Conservation program supporting eligible agricultural risk-management and resource improvements in participating states.
In practice: A producer checks whether AMA is offered locally.
Program geography is limited; confirm state availability.
USDA & public agencies · USDA agency supporting agricultural marketing through services such as grading, market news, and verification.
In practice: A produce seller reads an AMS market report.
In a dairy barn, AMS can instead mean an automatic milking system.
Soil & crop nutrition · Nitrogen-and-sulfur fertilizer also used in certain spray mixtures as a water conditioner.
In practice: An applicator checks whether the label calls for AMS.
Use the product label; do not confuse the chemical with USDA AMS.
Feed, forage & dairy · Equipment that automates milking tasks, often including cow identification and voluntary access.
In practice: A dairy monitors visits to its AMS.
Also called automated milking; this differs from USDA AMS.
Crop & livestock insurance · Production-history framework used to establish insured yields under applicable crop insurance rules.
In practice: A grower supplies yield records for an APH review.
Use the policy's approved yield and record rules, not a simple assumed average.
USDA & public agencies · USDA agency protecting animal and plant health and supporting related trade safeguards.
In practice: A livestock owner consults APHIS disease information.
Animal-movement requirements also depend on state and destination rules.
Crop & livestock insurance · RMA shorthand for its apiculture insurance program.
In practice: A beekeeper asks an agent about API rainfall-index coverage.
In technology, API means application programming interface.
Precision agriculture & equipment · Defined interface through which software exchanges data or functions.
In practice: A farm platform uses an API to transfer field records.
Software API is unrelated to the apiculture insurance abbreviation.
Farm programs & assistance · Farm commodity program providing revenue-based support when applicable program conditions are met.
In practice: A grain producer compares ARC with PLC before an election.
The official name uses Agriculture, not Agricultural. No current payment or eligibility is implied.
Farm programs & assistance · ARC option based on county-level revenue calculations for covered commodities.
In practice: A producer reviews the county revenue benchmark.
County results can differ from the farm's own experience.
Farm programs & assistance · ARC option using an individual farm revenue framework for participating covered commodities.
In practice: An adviser compares the individual option with county coverage.
Consult current program rules for the specific calculation and election.
Crop & livestock insurance · Deadline for reporting insured acreage under applicable insurance provisions.
In practice: A producer confirms the acreage-reporting requirement.
FSA and insurance reporting processes may have different requirements.
Markets, trade & farm data · USDA survey providing information about farm finances, practices, and resource use.
In practice: An analyst uses ARMS data to study farm costs.
Survey estimates summarize respondents and are not individual operating benchmarks.
Crop & livestock insurance · Area-based insurance plan protecting against specified area revenue declines.
In practice: An agent compares ARP and area yield protection.
Confirm the policy year; ARP also appears in historical farm-program materials.
Crop & livestock insurance · Crop insurance policy framework covering specified area-based outcomes.
In practice: An agent explains how area coverage differs from individual-farm coverage.
Area performance may not match the policyholder's loss.
USDA & public agencies · USDA's principal in-house scientific research agency.
In practice: An agronomist reviews an ARS crop-management study.
Distinct from university extension and competitive research grants.
Animal health & biosecurity · Serious viral disease of domestic and wild pigs.
In practice: A swine operation reviews ASF prevention information.
Disease status and movement rules must be checked from current authorities.
Livestock & genetics · Standardized animal reference used to express forage demand or stocking.
In practice: A grazing manager converts a herd to AU using a selected convention.
Conventions vary; animal size and production stage affect actual demand.
Livestock & genetics · Factor expressing an animal's forage demand relative to a standard animal unit.
In practice: A grazing calculation assigns an AUE to larger cows.
Formula: demand for the animal / demand for the reference animal, using a consistent basis.
Livestock & genetics · Forage demand associated with one animal unit for one month under a stated convention.
In practice: A grazing plan estimates available AUMs.
Animal-unit definitions and forage allowances must be stated.
Soil & crop nutrition · Amount of soil water held between specified upper and lower plant-availability limits.
In practice: An irrigator considers soil AWC when planning storage in the root zone.
Specify soil depth and units when comparing values.
Crop & livestock insurance · Area-based insurance plan using yield outcomes for the designated area.
In practice: A producer evaluates AYP exposure to county-level yields.
An individual farm loss may not trigger an area payment.
Livestock & genetics · Standardized visual or hands-on assessment of an animal's body reserves.
In practice: A herd manager records BCS before breeding.
Scales differ by species and production system; always name the scale.
Crops & pest management · Term used under the U.S. National Bioengineered Food Disclosure Standard for covered foods.
In practice: A food manufacturer reviews whether disclosure rules apply.
BE is a defined labeling category, not a universal synonym for every use of GMO.
Conservation & land · A management or structural practice used to address an identified production or environmental concern.
In practice: A farm uses a nutrient-management BMP to reduce runoff.
The appropriate practice depends on site conditions and applicable requirements.
Animal health & biosecurity · Producer education program addressing cattle care and practices affecting beef quality and safety.
In practice: A cattle operation uses BQA training for employees.
Training does not replace veterinary direction or applicable law.
Animal health & biosecurity · Multifactorial respiratory disease complex in cattle.
In practice: A feedlot reviews BRD risk with its veterinarian.
It is a disease complex rather than one single pathogen.
Animal health & biosecurity · Prion disease affecting cattle.
In practice: A feed-safety discussion references BSE controls.
Use official veterinary and feed regulations for prevention requirements.
Crops & pest management · Bacterium associated with insecticidal proteins used in certain microbial products and engineered crop traits.
In practice: An agronomist discusses a Bt corn trait.
Bt products and crop traits differ; follow the relevant label and resistance plan.
Farm finance & measurements · Volume unit used in crop trade, often associated with commodity-specific standard weights.
In practice: A grain contract quotes a price per bu.
A bushel has no universal weight. Case-insensitive search also finds BU, the insurance basic unit; use the subject filter.
Crop & livestock insurance · Crop insurance unit structure based on applicable policy and ownership or share arrangements.
In practice: An agent identifies the farm's basic units.
Unit structure changes how production and losses are combined.
Animal health & biosecurity · Viral disease of cattle with reproductive, immune, and other health effects.
In practice: A cattle herd develops a BVD control plan with its veterinarian.
Disease management depends on herd-specific assessment.
Livestock & genetics · Weight recorded at or shortly after birth in livestock performance records.
In practice: A calf record includes BW alongside calving information.
In nutrition, BW can instead mean body weight.
Livestock & genetics · An animal's measured or estimated live weight at a stated time.
In practice: A nutritionist uses current BW in a ration assessment.
Distinguish live weight from birth weight or carcass weight.
Soil & crop nutrition · Ratio of carbon to nitrogen in material such as crop residue or compost.
In practice: An adviser compares the C:N ratios of different residues.
Formula: carbon mass divided by nitrogen mass on the same basis.
Conservation & land · An animal feeding operation meeting regulatory size, discharge, or designation criteria.
In practice: An operator checks whether the facility is a CAFO under applicable rules.
The federal term is Concentrated, not Confined.
Crop & livestock insurance · Basic crop insurance coverage category subject to specific policy terms.
In practice: A producer compares CAT with additional coverage.
Coverage and administrative terms require the current policy.
Farm programs & assistance · Federal corporation used to finance and carry out specified agricultural support programs.
In practice: A program document identifies CCC as the payment authority.
A CCC form number is a document identifier, not a separate benefit.
Food safety & organic · Step where control is essential to prevent, eliminate, or reduce a food-safety hazard to an acceptable level.
In practice: A process hazard analysis identifies a CCP.
A CCP is determined by analysis, not by labeling every inspection point critical.
Markets, trade & farm data · USDA geospatial product mapping crop cover and related land-cover classes.
In practice: An analyst combines the CDL with county boundaries.
Classification accuracy varies by crop, place, and year.
Specialty production & sustainability · Production using managed growing conditions such as light, temperature, humidity, and nutrients.
In practice: A greenhouse monitors conditions as part of a CEA operation.
CEA includes different systems; it does not by itself mean organic production.
Soil & crop nutrition · Measure of a soil's ability to hold positively charged nutrient ions.
In practice: A soil report uses CEC to help explain nutrient-holding behavior.
CEC is a property of the soil, not a fertilizer dose.
Livestock & genetics · Genetic-evaluation trait predicting differences in unassisted calving attributable to a sire's calves under the evaluation rules.
In practice: A heifer-breeding plan considers CED.
Use the breed's definition and compatible evaluation base.
Crop & livestock insurance · Crop insurance provisions specifying procedures for determining relevant commodity prices.
In practice: An agent checks price-discovery provisions for a crop.
The price methodology is commodity- and policy-specific.
Water, irrigation & weather · Volumetric flow unit used for streams, canals, and water delivery.
In practice: A canal report gives a flow in CFS.
Formula: 1 CFS is approximately 448.83 U.S. gallons per minute.
Markets, trade & farm data · Trade term describing seller obligations for specified transport and insurance in a shipment.
In practice: An export quote uses CIF with a named destination port.
Under Incoterms, cost and risk transfer at different points; use the contract's rules.
Conservation & land · NRCS grants supporting development and adoption of innovative conservation approaches.
In practice: A project team proposes a new conservation demonstration.
CIG is distinct from routine conservation practice cost assistance.
Markets, trade & farm data · USDA field-level spatial unit used in agricultural program administration.
In practice: A program map identifies a CLU boundary.
Administrative boundaries may differ from a producer's current working field divisions.
Conservation & land · Integrated conservation plan addressing manure, nutrients, and related resource concerns at animal operations.
In practice: A dairy coordinates manure storage and field applications through a CNMP.
It is broader than a fertilizer recommendation.
Specialty production & sustainability · Common unit expressing climate impact of different greenhouse gases using specified equivalence factors.
In practice: A project reports emissions in metric tons of CO2e.
Results depend on the global-warming-potential values and time horizon used.
Farm finance & measurements · Costs assigned to products sold under the applicable accounting method.
In practice: A farm-food business calculates COGS for a product line.
Inventory, production, and tax accounting rules affect the calculation.
Food safety & organic · Origin-labeling requirements for covered commodities under the applicable U.S. rules.
In practice: A retailer reviews COOL obligations for a covered product.
Commodity coverage and exemptions differ.
Feed, forage & dairy · Protein estimate based on measured nitrogen and a conversion factor.
In practice: A hay test reports CP on a dry-matter basis.
Crude protein includes nonprotein nitrogen; it is not a direct measure of usable protein.
Water, irrigation & weather · NOAA center producing climate outlooks and monitoring products.
In practice: A grower reads a CPC seasonal precipitation outlook.
An outlook gives probabilities, not a daily farm forecast.
Farm programs & assistance · CRP partnership approach addressing targeted conservation priorities.
In practice: A producer asks whether a local CREP agreement covers a watershed.
Availability varies by partnership and location.
Farm programs & assistance · FSA program paying eligible participants to establish conservation cover on enrolled land under contracts.
In practice: A landowner discusses sensitive acreage with the local FSA office.
Enrollment, permitted uses, and contract terms require program review.
Specialty production & sustainability · Marketing arrangement in which customers support a farm and receive an agreed share of its production.
In practice: A vegetable farm sells seasonal CSA shares.
Delivery terms and crop-risk sharing depend on the actual agreement.
Specialty production & sustainability · Approach addressing agricultural productivity, resilience, and climate-related objectives under a stated framework.
In practice: A project describes its management practices as CSA.
The term has multiple frameworks and does not certify a carbon outcome.
Specialty production & sustainability · Agriculture-and-forestry framing for practices addressing climate-related goals and resilience.
In practice: A research project evaluates CSAF practices.
Program names and funding arrangements can change; verify the specific initiative.
Animal health & biosecurity · Contagious viral disease of pigs, also known as hog cholera.
In practice: A producer reviews signs and reporting information for CSF.
CSF and African swine fever are caused by different viruses.
Conservation & land · NRCS program supporting existing conservation efforts and additional conservation activities.
In practice: A ranch considers improvements across its whole operation.
CSP and EQIP have different participation structures.
Conservation & land · NRCS assistance with understanding resources and planning conservation work.
In practice: A grower requests help evaluating soil-erosion concerns.
Technical assistance does not necessarily include a financial award.
Animal health & biosecurity · Official animal-health document commonly required for specified animal movements.
In practice: A producer checks destination requirements before shipping animals.
A CVI is not required for every movement; rules vary.
Conservation & land · Federal law governing water-pollution control and related water-quality programs.
In practice: A producer examines water rules relevant to a proposed activity.
Specific duties depend on the activity and jurisdiction.
Farm finance & measurements · Weight unit equal to 100 pounds in common U.S. agricultural trade.
In practice: A dairy price quote is expressed per cwt.
Formula: pounds / 100 = U.S. cwt. Other countries may use a different hundredweight.
Water, irrigation & weather · U.S. Drought Monitor category describing dryness that may precede drought or persist during recovery.
In practice: A county appears in the D0 map category.
D0 is not classified as drought; drought categories begin at D1.
Water, irrigation & weather · First drought-intensity category on the U.S. Drought Monitor.
In practice: A producer tracks a shift from D0 to D1.
Categories summarize multiple indicators and impacts.
Water, irrigation & weather · U.S. Drought Monitor drought-intensity category above moderate drought.
In practice: A watershed appears in D2 on the weekly map.
Category labels are not farm-program eligibility decisions.
Water, irrigation & weather · U.S. Drought Monitor drought-intensity category above severe drought.
In practice: A regional bulletin describes D3 conditions.
Use local information alongside the regional assessment.
Water, irrigation & weather · Highest drought-intensity category on the U.S. Drought Monitor.
In practice: A farm manager reviews D4 impacts in a drought plan.
A map category does not establish a particular farm's losses.
Crops & pest management · Elapsed days since seedlings emerged.
In practice: A researcher schedules a measurement at 20 DAE.
Specify how emergence was defined for the plot.
Soil & crop nutrition · Nitrogen-and-phosphate fertilizer commonly sold with an 18-46-0 grade.
In practice: A crop budget includes DAP as a nutrient source.
Verify the actual guaranteed analysis; DAP also means days after planting.
Crops & pest management · Elapsed days since planting, used to describe crop development or an observation.
In practice: A field trial records emergence at 12 DAP.
Calendar age does not capture all temperature effects.
Feed, forage & dairy · Feed energy remaining after subtracting energy lost in feces.
In practice: A feed table lists DE for a species.
Digestible energy is not the same as metabolizable or net energy.
Precision agriculture & equipment · Digital representation of surface elevations used in mapping and terrain analysis.
In practice: An adviser examines a DEM for potential drainage patterns.
Resolution and surface definition affect the analysis.
Precision agriculture & equipment · GPS positioning improved using correction information from a reference source.
In practice: An older equipment manual describes DGPS guidance.
Differential methods and RTK are not identical.
Feed, forage & dairy · Herd recording and testing system supporting dairy performance management.
In practice: A dairy uses a DHI report to review production.
Often delivered through herd-improvement organizations.
Feed, forage & dairy · Organization providing dairy herd testing and record services.
In practice: A farm arranges testing through a DHIA.
Association services and data definitions can vary.
Feed, forage & dairy · Number of days since an animal calved and began the current lactation.
In practice: A herd dashboard groups cows by DIM.
DIM describes lactation stage, not milk volume.
Specialty production & sustainability · Total photosynthetically active light received per unit area over a day.
In practice: A greenhouse uses DLI to plan supplemental lighting.
Commonly expressed in mol/m²/day; it measures accumulated light, not instantaneous intensity.
Feed, forage & dairy · Feed material remaining after moisture is excluded.
In practice: A forage test reports nutrients on a DM basis.
Formula: dry-matter percentage = 100 − moisture percentage on a wet basis.
Crop & livestock insurance · FSA program providing dairy margin protection based on the program's milk-price and feed-cost calculation.
In practice: A dairy compares DMC with commercial insurance choices.
DMC and DRP are separate programs with different mechanics.
Feed, forage & dairy · Amount of feed dry matter consumed over a stated period.
In practice: A cow consumes 50 lb of dry matter per day.
Formula: as-fed intake × dry-matter fraction. Account for refusals.
Specialty production & sustainability · Oxygen dissolved in water and available to aquatic organisms or roots.
In practice: A fish grower monitors DO in a production pond.
Species, temperature, and system conditions determine appropriate levels.
USDA & public agencies · Federal department responsible for labor-related programs including agricultural wage and worker protections.
In practice: An employer looks up DOL agricultural employment guidance.
State labor departments can impose additional requirements.
Crop & livestock insurance · Insurance covering specified declines in quarterly milk revenue.
In practice: A dairy discusses DRP endorsements with an agent.
It differs from Dairy Margin Coverage, an FSA program.
Farm finance & measurements · Measure comparing cash or income available for debt service with required debt payments.
In practice: A lender tests whether projected cash flow covers scheduled debt service.
Formula: available debt-service funds / required debt service, using the lender's definitions.
Specialty production & sustainability · Hydroponic method suspending plant roots in an aerated nutrient solution.
In practice: A leafy-greens operation uses floating rafts in DWC.
Water quality, oxygen, and sanitation remain essential.
Farm finance & measurements · Earnings measure excluding specified financing, tax, and noncash expenses.
In practice: A business review reconciles EBITDA to farm financial statements.
EBITDA is not cash available after capital spending and debt repayments.
Livestock & genetics · Estimate of an animal's genetic merit for a trait relative to an evaluation base.
In practice: A sheep breeder compares EBVs in a selection program.
An EPD is commonly half the breeding-value expression for the same trait framework.
Soil & crop nutrition · Measurement used to indicate dissolved salts in a soil or water sample.
In practice: A greenhouse manager checks nutrient-solution EC.
Compare values only with the same units and test method. EC also describes a pesticide formulation.
Crops & pest management · Liquid pesticide formulation designed to form an emulsion when diluted as directed.
In practice: An applicator identifies EC on a product description.
This formulation abbreviation is unrelated to electrical conductivity.
Crop & livestock insurance · Area-based supplemental crop insurance endorsement covering a specified upper band of expected area outcomes.
In practice: An agent explains ECO alongside other coverage.
Coverage levels and combinations must be checked against current policy rules.
Farm programs & assistance · FSA program supporting rehabilitation of eligible disaster-damaged farmland and emergency water conservation.
In practice: A farmer asks about restoring fences after a disaster.
Contact FSA before starting work when approval is required.
Farm programs & assistance · FSA disaster assistance for eligible restoration of nonindustrial private forestland.
In practice: A woodland owner documents storm-damaged forest acreage.
Forest restoration and agricultural crop coverage are different programs.
Animal health & biosecurity · Identification using an electronically readable device or code.
In practice: A flock-management system records EID values.
EID is broader than one specific tag technology.
Crops & pest management · Lowest pest population level at which economic loss equals the cost of control under the stated assumptions.
In practice: A specialist considers crop value and control cost when estimating EIL.
An action threshold is generally set to prevent reaching this level.
Farm labor & workplace safety · Federal tax identification number assigned by the IRS to a business or other entity.
In practice: An agricultural employer uses its EIN on payroll tax filings.
An EIN differs from an employee's Social Security number.
Farm programs & assistance · FSA assistance covering certain eligible losses outside other livestock disaster programs.
In practice: A beekeeper asks FSA about documented colony losses.
Different loss categories have different requirements.
Water, irrigation & weather · Coupled tropical Pacific ocean-atmosphere pattern that influences seasonal climate.
In practice: A producer reads an ENSO discussion in a seasonal outlook.
ENSO shifts probabilities; it does not determine weather at one farm.
USDA & public agencies · Federal agency administering environmental programs relevant to pesticides, water, and agricultural operations.
In practice: An applicator checks EPA worker-protection guidance.
State requirements may also apply.
Livestock & genetics · Prediction of how an animal's offspring will perform for a trait relative to offspring of other evaluated animals.
In practice: A bull buyer compares calving-ease and growth EPDs.
Compare within a compatible evaluation; an EPD is not a guarantee for an individual calf.
Conservation & land · NRCS program offering technical and financial assistance for eligible conservation practices.
In practice: A farmer explores assistance for an irrigation-efficiency project.
A conservation plan is not an automatic funding commitment.
Farm programs & assistance · Name used for federal assistance addressing eligible agricultural losses from specified disaster years.
In practice: An older farm file contains an ERP application.
Historical disaster rounds have distinct years and rules; this entry does not indicate an open enrollment.
USDA & public agencies · USDA agency producing economic research and data about agriculture, food, and rural communities.
In practice: A farm adviser uses ERS income data to understand sector trends.
National estimates are not an individual farm budget.
Soil & crop nutrition · Percentage of soil cation-exchange capacity occupied by sodium.
In practice: A soil specialist uses ESP when investigating sodicity.
Salinity and sodicity are different conditions.
Crops & pest management · Pest level at which action should be taken to prevent an economically damaging population.
In practice: A scout compares insect counts with a crop-specific threshold.
ET also means evapotranspiration in water management.
Water, irrigation & weather · Combined transfer of water to the atmosphere through evaporation and plant transpiration.
In practice: An irrigator uses ET estimates in a water budget.
This water term differs from the pest-management economic threshold.
Livestock & genetics · Reproductive technique transferring an embryo to a recipient female.
In practice: A breeding program uses ET to expand selected genetics.
In other agricultural contexts, ET means evapotranspiration or economic threshold.
Water, irrigation & weather · Estimated evapotranspiration for a crop under specified growing conditions.
In practice: An adviser adjusts reference ET for crop stage.
Formula: ETc = Kc × ETo in a single-coefficient method with a compatible reference.
Water, irrigation & weather · Evapotranspiration estimate for a specified reference surface under defined conditions.
In practice: An irrigation schedule begins with local ETo estimates.
Reference surface and calculation method must be identified.
Crop & livestock insurance · Crop insurance unit combining eligible acreage under specified crop, county, and policy rules.
In practice: A producer compares enterprise and optional units.
Combining acreage changes how losses are measured.
Conservation & land · NRCS program helping eligible sponsors address watershed threats after natural disasters.
In practice: A local sponsor evaluates urgent stream damage after flooding.
EWP generally works through eligible sponsors.
USDA & public agencies · USDA agency connecting U.S. agriculture with international markets and trade information.
In practice: An exporter reviews FAS market intelligence.
FAS also has an unrelated trade-delivery meaning.
Markets, trade & farm data · Trade-delivery term requiring delivery alongside the nominated vessel under applicable contract rules.
In practice: An export quote specifies FAS at a named port.
This shipping term differs from USDA's Foreign Agricultural Service.
Water, irrigation & weather · Soil-water condition after excess gravitational water has substantially drained.
In practice: A manager uses FC as an upper reference in an irrigation water balance.
It is a practical reference condition, not one universal water percentage.
USDA & public agencies · Federal corporation whose crop insurance programs are managed by RMA.
In practice: A policy references FCIC provisions.
FCIC and RMA are related but are not interchangeable names.
Livestock & genetics · Feed consumed per unit of animal weight gain on a stated basis.
In practice: A group eats 600 lb of feed and gains 100 lb, producing an FCR of 6:1.
Formula: feed intake / weight gain. Specify dry-matter or as-fed feed weight.
USDA & public agencies · Federal agency overseeing foods within its jurisdiction, animal drugs, and other regulated products.
In practice: A produce farm reviews FDA produce-safety materials.
Meat and poultry inspection frequently falls under USDA FSIS.
Farm labor & workplace safety · Law underlying Social Security and Medicare payroll taxes for covered employment.
In practice: A payroll review checks FICA treatment for agricultural wages.
Special agricultural wage and employment rules can apply.
Farm finance & measurements · Inventory assumption or stock-rotation method using the earliest items first.
In practice: A store rotates older feed inventory before newer deliveries.
Physical stock rotation and accounting cost assumptions are separate choices.
Crops & pest management · Federal law governing pesticide registration, distribution, sale, and use.
In practice: A pesticide label carries directions under FIFRA.
A glossary does not substitute for label directions.
Farm labor & workplace safety · Person or entity performing covered farm labor contracting activities under the applicable law.
In practice: A grower checks a contractor's registration and authorized activities.
Registration requirements, exemptions, and state rules may differ.
Farm labor & workplace safety · Employee performing specified farm labor contracting activities for a farm labor contractor.
In practice: A contractor reviews whether an employee needs registration.
Do not assume the contractor's registration covers all employee activities.
Farm labor & workplace safety · Federal law establishing wage, overtime, recordkeeping, and youth-employment standards with agricultural provisions and exemptions.
In practice: A farm reviews worker duties before determining applicable rules.
Agricultural exemptions are fact-specific; state law may provide additional protections.
Animal health & biosecurity · Highly contagious viral disease affecting cloven-hoofed animals.
In practice: A livestock biosecurity plan addresses FMD preparedness.
This animal disease differs from human hand, foot, and mouth disease.
Markets, trade & farm data · USDA program supporting long-term development of overseas agricultural markets.
In practice: A trade association reviews FMD program materials.
In animal health, FMD means foot-and-mouth disease.
Precision agriculture & equipment · Software system organizing farm production, resource, and business records.
In practice: A manager stores field operations and costs in an FMIS.
Data definitions and export access matter when connecting systems.
USDA & public agencies · USDA agency administering federal nutrition assistance programs.
In practice: A farm-market operator reviews nutrition-program participation information.
Retailer authorization and program rules are separate from agricultural production.
Farm programs & assistance · FSA loan category supporting eligible farm purchase, improvement, or related ownership needs.
In practice: A beginning farmer asks about a direct FO loan.
FO describes a loan purpose; it is not an approval.
Markets, trade & farm data · Trade term allocating delivery responsibilities and risk at a specified point under the governing contract or rules.
In practice: A grain contract identifies an FOB location.
Domestic agricultural usage and Incoterms usage can differ; define the contract meaning.
Precision agriculture & equipment · Equipment structure designed to protect an operator from specified falling objects.
In practice: A forestry equipment assessment checks FOPS suitability.
ROPS and FOPS address different hazards.
Crops & pest management · Federal law that amended pesticide-related food-safety protections.
In practice: A residue discussion references FQPA standards.
Do not confuse pesticide residue limits with worker-entry intervals.
USDA & public agencies · USDA agency administering farm commodity, disaster assistance, conservation reserve, and lending programs.
In practice: A farmer contacts FSA about acreage reporting.
Do not confuse FSA farm services with a healthcare flexible spending account.
USDA & public agencies · USDA agency responsible for inspection of meat, poultry, and processed egg products within its jurisdiction.
In practice: A meat processor checks an FSIS inspection resource.
FDA and FSIS have different food oversight responsibilities.
Food safety & organic · Federal law establishing a prevention-oriented framework for food safety within FDA's jurisdiction.
In practice: A produce grower reviews which FSMA rules apply.
Coverage, exemptions, and compliance dates are rule-specific.
Food safety & organic · FDA framework requiring covered importers to verify specified food-safety practices of foreign suppliers.
In practice: A food importer evaluates its FSVP responsibilities.
The importer role and exemptions require the current rule.
Farm labor & workplace safety · Standardized workload measure translating hours into a specified full-time basis.
In practice: A labor plan converts 160 hours into four 40-hour FTE-weeks.
Formula: total hours / full-time hours for the same period. Legal programs may define FTE differently.
Farm labor & workplace safety · Federal law imposing unemployment tax on covered employers.
In practice: A farm employer reviews FUTA coverage tests.
Agricultural employer tests differ from some other businesses.
Livestock & genetics · Weight gain divided by feed intake over the same period.
In practice: An analyst expresses 100 lb gain from 600 lb feed as G:F of 0.167.
Formula: weight gain / feed intake; it is the reciprocal of FCR using the same basis.
Food safety & organic · Practices intended to reduce risks during agricultural production; in produce audits, commonly focused on food safety.
In practice: A produce operation prepares for a GAP audit.
Voluntary audit participation is distinct from regulatory compliance.
Markets, trade & farm data · USDA FAS system for agricultural trade data.
In practice: An analyst examines U.S. agricultural exports in GATS.
Product classifications and trade measures affect comparisons.
Crops & pest management · Accumulated heat units used to track crop or pest development under a stated model.
In practice: A grower tracks corn development using GDD.
Formula: for a simple model, max(0, mean daily temperature minus base temperature); crop-specific caps and methods may apply.
Crops & pest management · Techniques used to modify an organism's genetic material through biotechnology.
In practice: A crop description identifies a GE trait.
The method and trait matter more than the shorthand alone.
Livestock & genetics · EPD incorporating genomic information alongside other evaluation data.
In practice: A seedstock catalog includes GE-EPDs for young bulls.
Genomics adds information; trait priorities still depend on the herd.
Specialty production & sustainability · Gas contributing to the atmospheric greenhouse effect.
In practice: A farm inventory estimates emissions of specified GHGs.
Inventory boundaries, methods, and time periods must be stated.
Food safety & organic · Practices addressing food-safety risks during handling activities such as packing or storage.
In practice: A packing operation reviews GHP controls.
The meaning depends on the audit or standard being used.
Farm labor & workplace safety · International framework for chemical hazard classification and communication.
In practice: An employee recognizes a hazard pictogram aligned with GHS.
U.S. implementation follows OSHA's applicable Hazard Communication Standard.
Precision agriculture & equipment · Software and data methods for storing, analyzing, and displaying location-based information.
In practice: An adviser overlays soil and yield maps in GIS.
Coordinate systems and data quality must align.
Conservation & land · NRCS initiative supporting conservation of privately owned grazing lands.
In practice: A grazing group reviews technical education opportunities.
An initiative is not necessarily a direct payment program.
Crops & pest management · Broad shorthand for an organism whose genetic material has been changed through genetic engineering.
In practice: A buyer asks how a crop was developed.
Legal labeling categories use specific definitions that may differ from everyday usage.
Food safety & organic · Practices governing conditions and methods used in food or other regulated manufacturing.
In practice: A packing or processing operation reviews applicable GMP requirements.
Current food regulations often use the abbreviation CGMP.
Precision agriculture & equipment · General term for satellite navigation systems, including GPS and other constellations.
In practice: A guidance receiver uses multiple GNSS constellations.
GNSS is the broader category; GPS is one system.
Water, irrigation & weather · Flow rate measured in gallons each minute.
In practice: A pump specification gives output in GPM.
Identify U.S. versus imperial gallons before converting.
Precision agriculture & equipment · U.S. satellite system providing positioning, navigation, and timing information.
In practice: A tractor guidance receiver uses GPS signals.
Receiver capability and corrections determine practical positioning accuracy.
Soil & crop nutrition · A gridded form of SSURGO designed for spatial analysis.
In practice: An analyst combines gridded soils with a crop map.
Spatial resolution does not remove underlying survey uncertainty.
Food safety & organic · Standard identifier used to distinguish trade items in supply chains.
In practice: A produce case label includes a GTIN.
Item identification and lot identification serve different purposes.
Farm labor & workplace safety · U.S. immigration classification and associated program for qualifying temporary agricultural labor.
In practice: A farm reviews H-2A recruitment and employment requirements.
H-2A is a program code, not an acronym expanded letter by letter.
Food safety & organic · Food-safety system identifying hazards and controlling significant ones at defined steps.
In practice: A processor documents hazards and control measures in a HACCP plan.
Regulatory application depends on the food and process.
Conservation & land · Land classified using specified erosion criteria for federal conservation-compliance purposes.
In practice: A farmer checks the HEL determination for a field.
Official determinations, not visual appearance alone, control program compliance.
Conservation & land · Conservation-compliance provisions associated with farming highly erodible land and specified USDA benefits.
In practice: A participant reviews a conservation plan for HEL fields.
Requirements depend on official determinations and applicable program rules.
Precision agriculture & equipment · Power unit used in engine and equipment ratings.
In practice: A buyer compares tractor drawbar and PTO horsepower ratings.
Different rating locations and test conditions are not interchangeable.
Animal health & biosecurity · Avian influenza classification associated with specified virus characteristics and testing criteria.
In practice: A poultry producer reviews HPAI biosecurity updates.
Do not infer infection or risk from an acronym alone.
Markets, trade & farm data · U.S. wheat class often associated with strong protein and bread-making uses.
In practice: A buyer compares HRS wheat offers.
A wheat class is not a complete quality specification.
Markets, trade & farm data · U.S. wheat class commonly used in bread and related flour markets.
In practice: A grain report lists HRW wheat prices.
Quality attributes and contract grades still need specification.
Markets, trade & farm data · International commodity-classification system used as a basis for customs codes.
In practice: An exporter identifies the HS heading for an agricultural product.
National tariff schedules add detail beyond the international level.
Markets, trade & farm data · U.S. classification schedule used to identify import tariff treatment.
In practice: An importer checks the HTS classification of a product.
Duty rates and trade measures require current verification.
Precision agriculture & equipment · Connected sensors and devices exchanging data over networks.
In practice: A farm monitors connected soil and tank sensors.
Connectivity, maintenance, and data ownership are operational considerations.
Crops & pest management · Approach combining monitoring and suitable pest-control methods to manage pests and risks.
In practice: A scout checks pest pressure before recommending a response.
IPM is a decision process, not a promise to use or avoid a particular product.
Farm finance & measurements · Federal agency administering U.S. tax laws.
In practice: A farm business consults IRS guidance for agricultural employers.
State and local tax responsibilities are separate.
Livestock & genetics · Fertilization of eggs outside the animal followed by embryo development and possible transfer.
In practice: A livestock breeding program evaluates IVF options.
Use qualified veterinary and reproductive specialists.
Farm labor & workplace safety · Process examining job steps, hazards, and controls.
In practice: A supervisor conducts a JHA before a new maintenance task.
Often called a job safety analysis.
Water, irrigation & weather · Water-storage or runoff unit equal to one thousand acre-feet.
In practice: An outlook bulletin reports seasonal runoff in KAF.
KAF measures volume, not flow rate.
Water, irrigation & weather · Factor used to relate crop evapotranspiration to reference evapotranspiration.
In practice: An irrigator changes Kc as canopy cover develops.
Use coefficients matched to the crop, stage, and reference method.
Farm finance & measurements · Metric mass unit used in agricultural measurements and trade.
In practice: A trial converts harvested weights from lb to kg.
Formula: kilograms = pounds × 0.45359237.
Farm finance & measurements · Power unit equal to 1,000 watts.
In practice: A pump specification gives motor power in kW.
Power is a rate; energy use requires a time component.
Farm finance & measurements · Energy equal to one kilowatt used for one hour.
In practice: A 5 kW load operating for 4 hours uses 20 kWh.
Formula: power in kW × hours = kWh for a constant load.
Farm finance & measurements · U.S. customary mass unit used in yield, feed, and livestock records.
In practice: A feed ticket lists net weight in lb.
Formula: 1 lb = 0.45359237 kilograms exactly.
Farm programs & assistance · Commodity payment available in specified circumstances when a producer forgoes a marketing assistance loan.
In practice: A producer compares applicable LDP and loan options.
Do not assume a payment is available for a particular commodity or date.
Water, irrigation & weather · Irrigation application approach delivering water near the soil with specialized low-pressure equipment.
In practice: A pivot designer compares LEPA with spray packages.
System design and surface management influence runoff and uniformity.
Water, irrigation & weather · Irrigation approach using spray devices closer to the crop or ground than higher-elevation configurations.
In practice: An irrigator evaluates LESA sprinkler placement.
LESA and LEPA are related but distinct application arrangements.
Farm programs & assistance · Disaster program addressing eligible grazing losses from specified drought or fire conditions.
In practice: A rancher checks whether grazing losses fit LFP criteria.
A drought classification alone does not establish the operation's eligibility.
Crop & livestock insurance · Livestock insurance protecting a defined gross margin between livestock value and feed costs.
In practice: A producer compares LGM margin coverage with price-only coverage.
The insured margin follows program formulas.
Precision agriculture & equipment · Distance-sensing method using laser pulses to measure surfaces.
In practice: A drainage study uses LiDAR-derived elevation data.
Vegetation, processing, and survey specifications influence the result.
Farm finance & measurements · Inventory cost-flow assumption assigning newer costs to goods sold first.
In practice: An accountant reviews whether LIFO is used in a business's records.
Tax and accounting rules determine availability and treatment.
Farm programs & assistance · Disaster program addressing eligible livestock deaths and certain injured-animal sales tied to qualifying events.
In practice: A producer preserves records after a qualifying livestock loss.
Loss documentation and current program requirements matter.
Farm labor & workplace safety · Procedures for controlling hazardous energy during servicing or maintenance.
In practice: A maintenance plan isolates energy before work on equipment.
Applicable requirements depend on the equipment, work, and regulatory coverage.
Animal health & biosecurity · Avian influenza classification distinct from highly pathogenic avian influenza.
In practice: A surveillance report identifies an LPAI finding.
Low pathogenicity classification does not mean control measures are unnecessary.
Crop & livestock insurance · Livestock insurance covering specified price declines under its endorsement terms.
In practice: A cattle producer examines LRP coverage for an expected marketing date.
It is price-risk protection, not a general animal-mortality policy.
Water, irrigation & weather · Fraction of available soil water a manager permits to be depleted before irrigation.
In practice: An irrigation plan selects MAD for a sensitive growth stage.
MAD is a management choice; recommended values depend on crop and conditions.
Farm finance & measurements · Adjusted gross income modified by specified additions or exclusions for a particular provision.
In practice: A taxpayer checks the MAGI definition for a specific tax benefit.
There is no single MAGI formula that applies to every purpose.
Farm programs & assistance · Commodity loan that can give eligible producers financing while allowing later marketing decisions.
In practice: A grower examines a marketing loan for an eligible stored crop.
Loan eligibility, rates, and settlement rules are commodity-specific.
Soil & crop nutrition · Nitrogen-and-phosphate fertilizer commonly sold with an 11-52-0 grade.
In practice: An agronomist selects MAP for a nutrient plan.
MAP also names USDA's Market Access Program.
Markets, trade & farm data · USDA export-promotion program supporting eligible market-development activities.
In practice: An agricultural trade group reviews MAP participation.
This program abbreviation differs from monoammonium phosphate fertilizer.
Feed, forage & dairy · Feed energy remaining after fecal, urinary, and gaseous energy losses are considered.
In practice: A nutritionist uses ME values in a ration model.
Energy systems and species must be matched.
Crops & pest management · How a pesticide acts biologically on its target.
In practice: An adviser rotates effective herbicide MOA groups to manage resistance.
Product mixtures and group rotations must follow labels and sound resistance guidance.
Soil & crop nutrition · Common fertilizer name for potassium chloride.
In practice: A grower evaluates MOP for potassium needs.
Check crop chloride sensitivity and the product analysis.
Specialty production & sustainability · Processes used to quantify, communicate, and check outcomes such as emissions or carbon storage.
In practice: A soil-carbon project specifies an MRV plan.
Definitions may use monitoring instead of measurement; inspect the program's methodology.
Farm labor & workplace safety · Federal law establishing protections for covered migrant and seasonal agricultural workers.
In practice: A farm labor contractor reviews disclosure and registration requirements.
Coverage and exemptions must be evaluated; H-2A workers have a separate framework.
Farm finance & measurements · Mass unit equal to 1,000 kilograms.
In practice: An export report lists grain quantities in MT.
A metric ton differs from a 2,000-pound U.S. short ton.
Markets, trade & farm data · Average price measure calculated over a commodity's defined marketing year.
In practice: A producer reviews MYA prices in a farm-program discussion.
Marketing years differ by commodity; MYA is not today's cash bid.
USDA & public agencies · USDA library providing agricultural research and information resources.
In practice: A researcher searches NAL resources about alternative farming systems.
Useful for research, historical documents, and terminology.
Farm programs & assistance · FSA disaster assistance for eligible crops where federal crop insurance is not available.
In practice: A specialty-crop grower asks about NAP coverage.
Coverage application and loss-reporting requirements are separate steps.
USDA & public agencies · USDA agency conducting agricultural surveys and publishing production statistics.
In practice: A producer checks a NASS crop production release.
Survey estimates can be revised.
Feed, forage & dairy · Feed-fiber fraction representing major plant cell-wall components.
In practice: A nutritionist considers NDF when evaluating intake and ration structure.
NDF concentration and fiber digestibility answer different questions.
Feed, forage & dairy · Proportion of NDF digested under a defined laboratory or evaluation method.
In practice: A forage report gives NDFD at a stated incubation time.
Compare results only with compatible methods and time points.
Precision agriculture & equipment · Vegetation index using near-infrared and red-edge reflectance.
In practice: A drone survey compares NDRE across a dense canopy.
Formula: (NIR − red edge) / (NIR + red edge). Sensor bands and growth stage affect interpretation.
Precision agriculture & equipment · Spectral index comparing near-infrared and red reflectance to describe vegetation signals.
In practice: An analyst examines NDVI variation across a crop field.
Formula: (NIR − red) / (NIR + red). It is not a standalone diagnosis of crop stress.
Feed, forage & dairy · Energy available for maintenance and productive functions after accounting for heat losses in the energy system.
In practice: A feeding model separates maintenance and gain energy.
Net-energy values depend on the system and purpose.
Feed, forage & dairy · Net-energy measure associated with body-weight gain.
In practice: A growing-cattle ration model includes NEG.
A feed's maintenance and gain values need not be equal.
Feed, forage & dairy · Net-energy measure used in evaluating energy for milk production and associated needs.
In practice: A dairy nutritionist compares feeds using NEL.
Use the applicable dairy energy model and units.
Feed, forage & dairy · Net-energy measure associated with maintaining the animal.
In practice: A beef ration model includes NEM.
Use compatible units and feed evaluation methods.
Specialty production & sustainability · Hydroponic method moving a shallow film of nutrient solution past roots.
In practice: A lettuce operation grows plants in NFT channels.
Flow interruptions and root-zone conditions require active management.
USDA & public agencies · USDA agency supporting agricultural research, education, and extension through funding and partnerships.
In practice: A university project receives NIFA support.
NIFA is distinct from USDA's in-house research agency, ARS.
Precision agriculture & equipment · Spectral region used in vegetation sensing and certain feed or material analyses.
In practice: A camera records NIR reflectance from the crop canopy.
In feed testing, NIR refers to a different application of the same spectral region.
Precision agriculture & equipment · Analytical method estimating material properties from near-infrared spectra and calibration models.
In practice: A feed laboratory uses NIRS to estimate forage composition.
Calibration quality and sample type affect accuracy.
Conservation & land · Plan describing nutrient sources, crop needs, and management of nutrient applications.
In practice: A grower uses soil tests and crop requirements to plan fertilizer use.
A plan's required contents vary by program and jurisdiction.
Water, irrigation & weather · Federal agency providing weather, climate, ocean, and related scientific information.
In practice: A farm monitors NOAA weather information before field work.
Use the appropriate local forecast and warning service.
Food safety & organic · USDA program administering the federal organic regulatory framework.
In practice: A producer consults NOP information before seeking certification.
Organic claims require compliance with the applicable rules.
Food safety & organic · Federal advisory board making recommendations on organic standards and related matters.
In practice: An organic producer reviews a NOSB recommendation.
A recommendation is not automatically a final regulatory change.
Conservation & land · Clean Water Act permitting system for specified pollutant discharges to waters of the United States.
In practice: A facility reviews applicable discharge-permit requirements.
State agencies may administer authorized programs.
Animal health & biosecurity · Cooperative program supporting poultry disease testing and classification.
In practice: A hatchery checks NPIP participation requirements.
Program classifications are specific and do not certify absence of every disease.
Soil & crop nutrition · Shorthand for the three primary plant nutrients on fertilizer and crop-nutrition materials.
In practice: A farmer compares NPK fertilizer grades.
U.S. fertilizer grade numbers generally report N, P2O5, and K2O percentages, not elemental P and K.
Feed, forage & dairy · Nitrogen compounds that are not true protein but can contribute to crude-protein measurements.
In practice: A ration ingredient contains an NPN source.
Ruminant use depends on careful ration formulation; NPN is not interchangeable with true protein.
USDA & public agencies · USDA agency providing conservation planning, technical assistance, and support for conservation practices.
In practice: A rancher asks NRCS about a grazing conservation plan.
Program assistance depends on applicable criteria and funding.
Soil & crop nutrition · A measure of nitrogen-related output relative to nitrogen input, using a stated methodology.
In practice: A trial compares crop output with nitrogen applied.
Different NUE definitions exist; state the numerator, denominator, and baseline.
Water, irrigation & weather · NOAA service providing weather forecasts and warnings.
In practice: A crew leader checks an NWS heat or storm warning.
Forecasts and warnings change with conditions.
Farm programs & assistance · FSA loan category supporting eligible operating expenses, livestock, equipment, or other approved needs.
In practice: A producer discusses a seasonal OL application.
Direct and guaranteed loan arrangements differ.
Soil & crop nutrition · Soil material originating from living organisms and their residues at various stages of decomposition.
In practice: A grower tracks soil OM across repeated tests.
Compare results from consistent sampling depths and methods.
Food safety & organic · Independent nonprofit reviewing input products for use under specified organic standards.
In practice: A grower checks an input's OMRI listing and certifier requirements.
OMRI does not certify farms; product status does not replace certifier approval.
USDA & public agencies · Labor Department agency administering workplace safety and health standards.
In practice: A farm reviews OSHA agricultural safety resources.
Coverage and enforcement provisions depend on the operation and jurisdiction.
Food safety & organic · Plan describing how an operation will comply with organic production or handling requirements.
In practice: A farm updates its OSP with its certifier.
The plan must reflect actual practices and relevant changes.
Farm labor & workplace safety · Work or pay classified as overtime under the applicable law or policy.
In practice: A payroll review evaluates OT treatment for each worker's duties and location.
Do not assume all agricultural work is exempt under every law.
Crop & livestock insurance · Crop insurance unit subdivision available when policy criteria are satisfied.
In practice: A producer asks whether separate records support optional units.
Optional units require compliance with the applicable policy rules.
Markets, trade & farm data · Federal law supporting fair trading practices in the produce industry.
In practice: A produce business reviews PACA licensing and payment protections.
Licensing and trust provisions have specific requirements.
Specialty production & sustainability · Light in the conventional 400–700 nm range used for photosynthesis measurements.
In practice: A grower selects a PAR sensor for crop-light monitoring.
PAR describes a spectral range, while PPFD measures photon flux over an area.
Water, irrigation & weather · Water in the soil that plants can access within the specified root zone and availability limits.
In practice: An irrigator tracks depletion of PAW.
Formula: available storage is often estimated from field capacity minus wilting-point water content, multiplied by soil depth.
Food safety & organic · Qualified individual responsible for specified food-safety-plan activities under applicable FDA preventive-controls rules.
In practice: A facility identifies its PCQI for the food-safety plan.
Qualification and duties follow the applicable regulation.
Crops & pest management · Minimum time specified on a pesticide label between application and harvest.
In practice: An orchard checks the PHI before scheduling picking.
An expired REI does not mean the crop can be harvested.
Farm programs & assistance · Commodity support program tied to effective prices and applicable reference prices.
In practice: A producer reviews PLC materials alongside ARC.
PLC can also mean programmable logic controller in irrigation or equipment controls.
Precision agriculture & equipment · Industrial controller executing programmed logic for equipment and processes.
In practice: An irrigation controller uses a PLC to sequence valves.
This equipment term is unrelated to Price Loss Coverage.
Feed, forage & dairy · Mixed feed supplied alongside additional feed from another source such as a milking unit or pasture.
In practice: A robotic-milking dairy offers PMR at the bunk.
Account for total intake from all feeding locations.
Crop & livestock insurance · Failure to plant by applicable policy dates because of an insured cause, as defined by the policy.
In practice: A grower reports conditions preventing planting to the insurer.
Policy definitions, deadlines, and acreage eligibility control coverage.
Farm labor & workplace safety · Equipment worn to reduce exposure to workplace hazards.
In practice: A pesticide handler checks label-specified PPE.
Required equipment and training depend on the task, label, and hazards.
Specialty production & sustainability · Rate of photosynthetically active photons arriving per unit area.
In practice: A canopy light reading is reported in µmol/m²/s.
Formula: with constant PPFD, DLI = PPFD × illuminated seconds / 1,000,000.
USDA & public agencies · APHIS program protecting agriculture and natural resources from plant pests and diseases.
In practice: An importer checks PPQ requirements for plant material.
Requirements depend on the commodity, origin, and current pest conditions.
Crop & livestock insurance · Rainfall-index insurance program for eligible acreage used for grazing or haying.
In practice: A rancher reviews PRF index intervals.
Index rainfall does not measure the farm's actual forage loss directly.
Animal health & biosecurity · Viral disease complex affecting reproductive and respiratory performance in pigs.
In practice: A swine herd reviews PRRS surveillance with its veterinarian.
Testing and diagnosis require veterinary interpretation.
Markets, trade & farm data · USDA FAS database of commodity production, supply, and distribution information.
In practice: An exporter compares commodity balances in PSD.
Check units, market years, and estimate dates.
Farm finance & measurements · Pressure unit used for tires, sprayers, and irrigation equipment.
In practice: An irrigator checks operating pressure in PSI.
Distinguish gauge from absolute pressure when required.
Food safety & organic · FDA rule establishing standards for covered produce growing, harvesting, packing, and holding activities.
In practice: A farm evaluates PSR coverage and water requirements.
Applicability and exemptions must be assessed under current rules.
Livestock & genetics · Prediction of genetic merit an animal is expected to transmit to offspring for a trait.
In practice: A dairy sire evaluation reports PTA for milk yield.
Compare values within the relevant evaluation and base.
Food safety & organic · Industry initiative promoting standardized produce traceability practices.
In practice: A packer aligns case labels with PTI practices.
An industry initiative is distinct from FDA traceability regulations.
Precision agriculture & equipment · Mechanical connection transferring engine power to an implement or other equipment.
In practice: A tractor drives a baler through its PTO.
PTO also means paid time off; follow equipment guarding and shutdown procedures.
Farm labor & workplace safety · Employer-provided time away from work under an applicable leave policy.
In practice: A farm manager tracks approved PTO in the schedule.
This employment term is unrelated to a tractor's power take-off.
Water, irrigation & weather · Soil-water condition associated with plants remaining wilted rather than recovering under defined conditions.
In practice: A soil-water calculation uses PWP as a lower reference.
Actual plant response varies with species and conditions.
Specialty production & sustainability · Fish or other aquatic production system treating and reusing much of its water.
In practice: A fish facility monitors treatment processes in an RAS.
Recirculation does not mean water quality can be left unattended.
USDA & public agencies · USDA agency supporting rural business development and cooperatives.
In practice: A rural business studies RBCS programs.
The agency name is also written with an ampersand or hyphenated abbreviation.
Conservation & land · NRCS program joining partners and producers in conservation projects.
In practice: A producer checks whether a regional RCPP project includes the farm.
Project opportunities are geographically and operationally specific.
USDA & public agencies · USDA mission area supporting rural housing, utilities, business, and community development.
In practice: A cooperative reviews RD programs for a rural facility.
RD contains several agencies with distinct responsibilities.
Feed, forage & dairy · Feed protein fraction broken down in the rumen.
In practice: A ration balances RDP with fermentable energy.
Adequacy depends on the full ration, not one feed alone.
Farm programs & assistance · USDA Rural Development program supporting eligible renewable-energy and energy-efficiency projects.
In practice: A rural business investigates REAP for an energy project.
Funding opportunities and applicant eligibility must be checked live.
Crops & pest management · Time after a pesticide application during which entry into a treated area is restricted.
In practice: A supervisor checks the REI before assigning field work.
REI and preharvest interval serve different purposes; exceptions are tightly defined.
Animal health & biosecurity · Electronic identification using radio communication between a tag and reader.
In practice: A livestock operation reads RFID ear tags.
Not every electronic tag qualifies as official animal identification.
Feed, forage & dairy · Forage quality index incorporating digestible nutrients and intake estimates, including fiber digestibility.
In practice: A hay buyer compares RFQ alongside the full analysis.
RFQ and RFV are different indices and should not be substituted directly.
Feed, forage & dairy · Forage index combining predicted digestibility and intake from fiber measurements.
In practice: A buyer uses RFV to compare similar hay lots.
RFV does not fully account for fiber-digestibility differences.
USDA & public agencies · USDA Rural Development agency supporting rural housing and community facilities.
In practice: A rural organization consults RHS housing information.
Separate from FSA farm ownership loans.
Crop & livestock insurance · Insurance index based on rainfall data for a defined geographic area and period.
In practice: A producer compares index rainfall with local observations.
Basis risk exists when index outcomes differ from the farm's experience.
USDA & public agencies · USDA agency overseeing the federal crop insurance system.
In practice: An agent consults RMA materials about an insurance plan.
Insurance policies are generally sold and serviced by approved private providers.
Farm finance & measurements · Profitability measure relating a defined return to the asset base.
In practice: A lender examines farm ROA alongside cash flow.
Farm-management formulas vary; identify interest and owner-labor adjustments.
Farm finance & measurements · Profitability measure relating a defined return to owner equity.
In practice: A farm review compares ROE across years.
Use a consistent earnings definition and equity basis.
Farm finance & measurements · Return expressed relative to an investment's stated cost.
In practice: A farm compares incremental benefits with equipment cost.
Formula: net return attributable to the investment / investment cost × 100%; specify period and included costs.
Precision agriculture & equipment · Protective frame or cab designed to reduce crushing risk during a rollover when used as intended.
In practice: A tractor inspection includes the ROPS and restraint system.
Use the appropriate seat belt and follow the equipment manufacturer's instructions.
Crop & livestock insurance · Crop insurance plan protecting against covered revenue losses from yield, price, or both.
In practice: A grower reviews RP with an insurance agent.
The revenue guarantee and harvest-price treatment follow policy provisions.
Crop & livestock insurance · Revenue coverage option excluding an upward guarantee adjustment from a higher harvest price.
In practice: A producer compares RP-HPE with RP.
The distinction concerns guarantee mechanics, not whether all price changes are ignored.
Precision agriculture & equipment · Rotational-speed unit for shafts, engines, and equipment.
In practice: An operator checks the specified PTO RPM.
Match the implement's required speed and operating instructions.
Precision agriculture & equipment · Carrier-phase positioning method using correction information for precise positioning.
In practice: A grower uses RTK guidance for repeatable field passes.
Accuracy depends on corrections, receiver setup, and operating conditions.
Crops & pest management · Pesticide classified for restricted use under applicable certification and supervision rules.
In practice: A purchaser checks certification requirements before buying an RUP.
Read the label and state certification requirements.
Feed, forage & dairy · Feed protein fraction escaping rumen degradation for potential digestion later in the tract.
In practice: A nutritionist evaluates RUP in a dairy ration.
RUP also means restricted use pesticide in crop protection.
USDA & public agencies · USDA Rural Development agency supporting rural utility infrastructure.
In practice: A rural utility examines RUS financing options.
Utility programs have their own applicant and project requirements.
Soil & crop nutrition · Model used to estimate rill and interrill soil erosion from rainfall and runoff.
In practice: A conservation planner compares erosion estimates under different tillage systems.
An erosion model does not measure every sediment pathway.
Soil & crop nutrition · Index describing sodium relative to calcium and magnesium in water or soil extracts.
In practice: An irrigation-water report includes SAR.
Interpret it with salinity, soil conditions, and the laboratory method.
Specialty production & sustainability · USDA-supported program funding research and education on sustainable agriculture.
In practice: A producer explores a regional SARE grant opportunity.
Grant categories and application cycles vary by region.
Crops & pest management · Liquid pesticide formulation with solid active particles suspended in a liquid.
In practice: An applicator checks agitation requirements for an SC.
Formulation codes describe physical form, not toxicity.
Precision agriculture & equipment · System for monitoring and supervising distributed equipment or processes.
In practice: An irrigation district monitors pumps through SCADA.
Remote control requires appropriate access controls and operational safeguards.
Feed, forage & dairy · Concentration of somatic cells in milk, used as an indicator of udder health and milk quality.
In practice: A dairy follows bulk-tank and individual-cow SCC trends.
Sample type and herd context matter; one count is not a diagnosis.
Crop & livestock insurance · Deadline specified for buying or changing insurance coverage for the applicable crop and policy.
In practice: A grower verifies the SCD with an agent.
Dates vary; no date in a generic glossary should be treated as a deadline.
Crop & livestock insurance · Area-based supplemental coverage for a portion of a crop insurance policy's deductible.
In practice: A producer discusses layering SCO with an underlying policy.
Area losses and individual farm losses can differ; eligibility rules apply.
Feed, forage & dairy · Transformed expression of somatic cell count used in dairy records and evaluations.
In practice: A herd report displays SCS rather than the raw cell count.
Confirm the transformation used before interpreting numerical changes.
Water, irrigation & weather · Irrigation using buried drip lines to deliver water below the soil surface.
In practice: A producer monitors flow in an SDI system.
Filtration, maintenance, and root-zone placement affect performance.
Farm programs & assistance · Federal disaster assistance program for eligible losses under its designated coverage and payment rules.
In practice: A producer checks the current SDRP instructions for an applicable loss year.
Use the specific program round and current FSA materials.
Farm labor & workplace safety · Document describing a chemical's hazards and safety information in a standardized format.
In practice: A supervisor locates the SDS for a cleaning chemical.
An SDS does not replace pesticide label directions.
Crops & pest management · Liquid pesticide formulation intended to dissolve in an appropriate diluent.
In practice: A product label identifies the formulation as SL.
Confirm the specific product's mixing and use directions.
USDA & public agencies · Federal nutrition assistance program administered through USDA FNS and state agencies.
In practice: A farmers market checks SNAP retailer authorization requirements.
Accepting benefits requires appropriate authorization and transaction processes.
Water, irrigation & weather · Automated NRCS network collecting snowpack and related climate observations.
In practice: A producer follows a nearby SNOTEL site's snow-water readings.
One station may not represent an entire watershed.
Crops & pest management · Specific biological target affected by a pesticide.
In practice: A weed scientist discusses a herbicide's target enzyme.
Some materials use mode and site of action differently; check the classification system.
Soil & crop nutrition · Carbon contained in the organic fraction of soil.
In practice: A project measures SOC rather than assuming all soil carbon is organic.
SOC and organic matter percentages are related but not identical.
Soil & crop nutrition · Common fertilizer name for potassium sulfate.
In practice: A grower compares potassium sources for a chloride-sensitive crop.
SOP also means standard operating procedure.
Farm labor & workplace safety · Written procedure describing how a recurring task is performed.
In practice: A packing crew follows an approved sanitation SOP.
An SOP must reflect the equipment, hazards, and current requirements; SOP also means sulfate of potash.
Markets, trade & farm data · U.S. wheat class commonly used for products such as cookies and crackers.
In practice: A mill reviews SRW supply data.
Distinguish class, grade, and protein requirements.
Food safety & organic · Written sanitation procedure specifying how sanitary conditions are maintained.
In practice: A meat facility documents cleaning and sanitation activities.
Requirements depend on the inspection and regulatory framework.
Soil & crop nutrition · Detailed digital soil-survey information maintained through USDA soil survey programs.
In practice: A planner looks up mapped soil properties for a field.
Map units may contain several soil components.
Water, irrigation & weather · Depth of liquid water represented by a snowpack if melted.
In practice: A water manager tracks SWE before irrigation season.
Snow depth and SWE are different measurements.
Farm labor & workplace safety · Recording and managing employee work time, attendance, and related exceptions.
In practice: A crew supervisor reviews T&A before payroll.
Time records support payroll and job costing but do not determine legal classifications by themselves.
Livestock & genetics · Artificial insemination scheduled using a defined reproductive management protocol.
In practice: A cattle operation plans labor around a TAI breeding day.
Protocol selection and animal suitability need professional guidance.
Farm programs & assistance · Disaster program helping eligible orchardists and nursery growers with qualifying tree, bush, or vine losses.
In practice: An orchard documents damaged trees after a disaster.
Tree replacement assistance differs from assistance for lost crop revenue.
Feed, forage & dairy · Estimate of digestible feed nutrients used as an energy measure.
In practice: A ration sheet lists TDN percentage.
Use the same calculation system when comparing feeds.
Water, irrigation & weather · Combined concentration of dissolved substances in water.
In practice: An irrigation-water analysis reports TDS in milligrams per liter.
TDS and electrical conductivity are related but are not interchangeable without an appropriate conversion.
Feed, forage & dairy · Index combining temperature and humidity to describe thermal conditions relevant to livestock.
In practice: A dairy uses THI trends when evaluating heat load.
Species, formula, acclimation, and additional weather factors affect interpretation.
Conservation & land · Water-quality planning calculation allocating the pollutant load a waterbody can receive while meeting standards.
In practice: A watershed group studies a nutrient TMDL.
A TMDL is not itself an individual farm application rate.
Feed, forage & dairy · Ration mixing forage, concentrates, and other ingredients into a combined feed.
In practice: A dairy checks TMR uniformity at the feed bunk.
The mixing process does not guarantee correct nutrient balance.
Soil & crop nutrition · Liquid fertilizer solution supplying nitrogen in urea, ammonium, and nitrate forms.
In practice: A sprayer applies a planned UAN sidedress treatment.
Products have different nitrogen concentrations; confirm the analysis.
Precision agriculture & equipment · Aircraft operated without an onboard pilot together with its control and supporting components.
In practice: A farm contracts a UAS crop-imaging service.
FAA operating requirements depend on the activity and aircraft.
Precision agriculture & equipment · Uncrewed aircraft; the vehicle portion of an unmanned aircraft system.
In practice: A grower uses UAV imagery to inspect a field.
UAS is broader because it includes supporting systems.
Food safety & organic · Barcode and numbering convention commonly used to identify retail products.
In practice: A farm-food business assigns a UPC to a retail item.
A retail product code alone does not identify the production lot.
USDA & public agencies · Federal department responsible for a broad range of farm, food, rural, and natural-resource programs.
In practice: A grower starts with USDA to identify the agency handling a farm question.
Different USDA agencies administer different services.
Water, irrigation & weather · Map and data product summarizing drought conditions across the United States.
In practice: A rancher checks the USDM category for the county.
The map is not a direct measurement of an individual pasture's condition.
Markets, trade & farm data · Trade agreement governing covered trade among the three countries.
In practice: An exporter reviews USMCA rules of origin.
Preferential treatment depends on meeting applicable requirements.
Farm programs & assistance · USDA grant program supporting eligible value-added agricultural planning or working-capital projects.
In practice: A producer studies a grant opportunity for branded food products.
A funding announcement controls application requirements.
Animal health & biosecurity · Defined relationship supporting veterinary oversight and medical decisions for animals.
In practice: A livestock owner works with a veterinarian under a VCPR.
Requirements differ across federal and state contexts.
Animal health & biosecurity · Written veterinary authorization for use of a VFD drug in or on animal feed under its approved conditions.
In practice: A producer retains the VFD paperwork for a feed treatment.
VFD also means variable frequency drive in equipment control.
Precision agriculture & equipment · Electronic drive varying motor speed by controlling electrical supply frequency and related parameters.
In practice: An irrigation pump uses a VFD to adjust output.
In animal health, VFD means Veterinary Feed Directive.
Specialty production & sustainability · Difference between a reference saturation vapor pressure and actual vapor pressure.
In practice: A greenhouse compares VPD with crop response.
Leaf-to-air and air-based VPD calculations are different; specify temperature assumptions.
Precision agriculture & equipment · Applying seed, nutrients, or another input at changing rates across a field.
In practice: A field receives different fertilizer rates by management zone.
The prescription, calibration, and application record should agree.
Water, irrigation & weather · Irrigation that varies water application across a field or management zones.
In practice: A pivot applies less water in a wetter soil zone.
Use a field-specific prescription and verify system performance.
Precision agriculture & equipment · Equipment and control technology that varies application rates within a field.
In practice: A spreader uses VRT to follow a nutrient prescription.
Technology capability alone does not make a prescription agronomically appropriate.
USDA & public agencies · APHIS program responsible for animal-health activities and related veterinary services.
In practice: A veterinarian consults VS resources for animal movement.
VS is a program within APHIS, not a separate cabinet department.
Water, irrigation & weather · Volume of water divided by total volume of the sampled soil.
In practice: A soil sensor displays VWC as a percentage.
Formula: water volume / bulk soil volume × 100%.
Markets, trade & farm data · USDA report presenting supply-and-demand estimates for major agricultural commodities.
In practice: A grain marketer reads a WASDE release.
Forecasts and estimates change as information develops.
Conservation & land · Conservation-compliance provisions relating to wetland conversion and specified USDA benefits.
In practice: A producer consults USDA before altering drainage in a potential wetland.
Commonly associated with the term Swampbuster.
Crops & pest management · Dry granular pesticide formulation that disperses in water.
In practice: An applicator checks mixing instructions for a WDG.
Also commonly called a dry flowable formulation.
Soil & crop nutrition · Model used to simulate wind erosion and management effects.
In practice: A planner evaluates crop-residue changes in a windy region.
Its focus differs from rainfall-driven erosion models.
Farm labor & workplace safety · Coordinating employee scheduling, time, attendance, and related labor processes.
In practice: A farm connects schedules and approved work hours in a WFM system.
Operating needs vary across seasonal crews and year-round staff.
Crop & livestock insurance · Crop insurance plan providing revenue coverage across eligible farm commodities under one policy.
In practice: A diversified farm asks about WFRP.
Record requirements and revenue limits depend on current provisions.
USDA & public agencies · DOL division enforcing specified wage, child-labor, and agricultural worker-protection laws.
In practice: A farm employer consults WHD recordkeeping guidance.
Different employment laws can apply to the same operation.
USDA & public agencies · Federal nutrition program serving eligible pregnant, postpartum, and breastfeeding women, infants, and young children.
In practice: A farm-market operator reviews the separate rules of a WIC-related market program.
The abbreviation uses the population names rather than every word in the program title.
Crops & pest management · Dry pesticide formulation dispersed in water according to label instructions.
In practice: A mixing plan identifies a WP product.
Powders and soluble products behave differently in a tank mix.
Farm labor & workplace safety · EPA standard addressing pesticide exposure protections for covered agricultural workers and handlers.
In practice: A farm coordinates pesticide safety information with crew assignments.
WPS and wage-and-hour rules address different obligations.
Conservation & land · ACEP component supporting restoration and protection of eligible wetlands.
In practice: A landowner reviews wetland restoration options.
Review the actual easement terms before making land-use decisions.
Soil & crop nutrition · USDA online interface for viewing soil maps and related information.
In practice: A landowner defines an area of interest in WSS.
Field verification may be needed for site-specific decisions.
Livestock & genetics · Animal weight at weaning, reported as measured or adjusted under a specified system.
In practice: A cattle record includes an adjusted WW.
State age adjustments and evaluation rules before comparing.
Crop & livestock insurance · Crop insurance plan protecting against covered production losses using policy pricing.
In practice: A producer examines YP for yield-related risks.
Yield protection and revenue protection address different combinations of risk.
Livestock & genetics · Weight around one year of age, often adjusted under a performance-evaluation protocol.
In practice: A bull catalog reports YW information.
A YW EPD and an animal's measured yearling weight are different values.
Resolve the mix-ups that come up in farm visits, spray records, and program paperwork.
REI restricts worker entry after an application. PHI is the interval before harvest. One interval ending does not establish that the other has ended.
ARC uses a revenue-based support framework. PLC uses a price-based framework. These are farm programs, and their rules differ from crop insurance.
EQIP supports eligible conservation practices. CSP supports stewardship across an operation through existing conservation and additional activities.
Revenue Protection addresses covered revenue losses from price, yield, or both. Yield Protection addresses covered production losses using policy pricing.
ADF measures a more limited fiber fraction. NDF includes additional cell-wall components. Use the full feed analysis when evaluating digestibility and intake.
On a tractor, PTO transfers mechanical power to an implement. In a work schedule, PTO refers to paid time off. Context completely changes the meaning.
Connect employee scheduling, time and attendance, payroll, and job costing with TimeTrex.
Disclaimer: This reference tool provides educational definitions and general information on U.S. agricultural terminology and does not constitute agronomic, financial, legal, or regulatory compliance advice. Terms, program eligibility guidelines, safety intervals, and pesticide application instructions vary by jurisdiction and label specifications; always verify requirements directly with official USDA program materials, certified agricultural advisers, governing state and federal agencies, and current product labels before making farm management or operational decisions.
Disclaimer: The content provided on this webpage is for informational purposes only and is not intended to be a substitute for professional advice. While we strive to ensure the accuracy and timeliness of the information presented here, the details may change over time or vary in different jurisdictions. Therefore, we do not guarantee the completeness, reliability, or absolute accuracy of this information. The information on this page should not be used as a basis for making legal, financial, or any other key decisions. We strongly advise consulting with a qualified professional or expert in the relevant field for specific advice, guidance, or services. By using this webpage, you acknowledge that the information is offered “as is” and that we are not liable for any errors, omissions, or inaccuracies in the content, nor for any actions taken based on the information provided. We shall not be held liable for any direct, indirect, incidental, consequential, or punitive damages arising out of your access to, use of, or reliance on any content on this page.
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