Agriculture Pasture Carrying Capacity

Screen full-period animal counts from measured heterogeneous pasture forage with caller usable fraction/daily intake; excludes regrowth, nutrients and animal welfare and differs from generic population or aquaculture capacity models.

Description

A forage-budget capacity expresses how many animals a supplied dry-forage inventory can support over a fixed period.

A forage-budget capacity expresses how many animals a supplied dry-forage inventory can support over a fixed period. It differs from observed stocking exposure.^[1]

When to use Agriculture Pasture Carrying Capacity

Use this tool to screen full-period animal counts from measured heterogeneous pasture forage with caller usable fraction/daily intake; excludes regrowth, nutrients and animal welfare and differs from generic population or aquaculture capacity models.

Prepare the field, crop, soil or material measurements for the intended period. Confirm units, dry/wet bases and supplied parameters; keep paired observations aligned.

How to use Agriculture Pasture Carrying Capacity and understand its results

Prepare the field, crop, soil or material measurements for the intended period. Confirm units, dry/wet bases and supplied parameters; keep paired observations aligned.
Enter pastureAreasHa, measuredDryForageKgPerHa, usableForageFractions, callerDryForageKgPerAnimalDay, planningDays using the field table and calculation rules, then run the tool.
Read modelUsableDryForageKg, supportedAnimalDaysUnderBudget, wholeAnimalsForFullPlanningPeriod. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
pastureAreasHa	Pasture areas ha	list of number	Required
measuredDryForageKgPerHa	Measured dry forage kg per ha	list of number	Required
usableForageFractions	Usable forage fractions	list of number	Required
callerDryForageKgPerAnimalDay	Caller dry forage kg per animal day	number	Required
planningDays	Planning days	number	Required

Pair nonnegative pasture areas and measured dry forage kg/ha with usable fractions in [0,1]. Supply positive daily dry-forage kg/animal and planning days. Return usable kg, supported animal-days and rounded-down animals for the full period. Zero forage yields zero capacity.

Paired lists must be nonempty and have equal lengths.

usableForage = Σ(areaHa × dryKg/ha × usableFraction); animals = floor(usableForage/(dailyNeed × days))

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
modelUsableDryForageKg	Model usable dry forage kg	number
supportedAnimalDaysUnderBudget	Supported animal days under budget	number
wholeAnimalsForFullPlanningPeriod	Whole animals for full planning period	number

json

{
  "input": {
    "pastureAreasHa": [
      1,
      2
    ],
    "measuredDryForageKgPerHa": [
      1000,
      500
    ],
    "usableForageFractions": [
      0.5,
      0.5
    ],
    "callerDryForageKgPerAnimalDay": 10,
    "planningDays": 30
  },
  "output": {
    "modelUsableDryForageKg": 1000,
    "supportedAnimalDaysUnderBudget": 100,
    "wholeAnimalsForFullPlanningPeriod": 3
  }
}

Limitations and assumptions

Forage quality, regrowth, timing and animal welfare are excluded. Need and usable fractions are caller assumptions; the capacity is a budget screen rather than a validated stocking recommendation.

Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Agriculture Stocking Rate: Account observed grazing exposure and caller animal-unit equivalents by actual area/time, not inferred forage carrying capacity or a fixed head/ha welfare limit. For a complementary task, use Agriculture Soil Water Holding Capacity: Integrate measured layer field-capacity minus wilting-point water with explicit root accessibility; differs from soil porosity or gross field-capacity storage and no crop rooting depth is inferred.

References

Agriculture Pasture Carrying Capacity — tool.io

Similar or alternative tools

Agriculture Stocking Rate
Account observed grazing exposure and caller animal-unit equivalents by actual area/time, not inferred forage carrying capacity or a fixed head/ha welfare limit.
Agriculture Soil Water Holding Capacity
Integrate measured layer field-capacity minus wilting-point water with explicit root accessibility; differs from soil porosity or gross field-capacity storage and no crop rooting depth is inferred.