Agriculture Nitrogen Footprint
Audit declared N input/product/soil-stock balance and signed unaccounted residual per product mass; residual is not automatically environmental emission, and above-unit recovery may reveal stock depletion or omitted inputs.
Description
A nitrogen balance leaves an unaccounted residual after product removal and soil-stock change.
A nitrogen balance leaves an unaccounted residual after product removal and soil-stock change. That residual is not automatically an emission because omitted inputs or stock depletion can also change the balance.1
Audit declared N input/product/soil-stock balance and signed unaccounted residual per product mass; residual is not automatically environmental emission, and above-unit recovery may reveal stock depletion or omitted inputs.
When to use Agriculture Nitrogen Footprint
Use this tool to audit declared N input/product/soil-stock balance and signed unaccounted residual per product mass; residual is not automatically environmental emission, and above-unit recovery may reveal stock depletion or omitted inputs.
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 Nitrogen Footprint 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 reactiveNitrogenInputMassesKg, harvestedProductNitrogenKg, soilNitrogenStockChangeKg, marketableProductMassKg using the field table and calculation rules, then run the tool.
- Read totalDeclaredReactiveNitrogenInputKg, signedUnaccountedNitrogenKg, signedUnaccountedNitrogenKgPerProductKg, harvestedNitrogenRecoveryFraction. 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 |
|---|---|---|---|
| reactiveNitrogenInputMassesKg | Reactive nitrogen input masses kg | list of number | Required |
| harvestedProductNitrogenKg | Harvested product nitrogen kg | number | Required |
| soilNitrogenStockChangeKg | Soil nitrogen stock change kg | number | Required |
| marketableProductMassKg | Marketable product mass kg | number | Required |
Enter nonnegative reactive-nitrogen inputs and product nitrogen kg, signed soil-stock change kg and positive product mass. Total declared input must be positive. Return total input, signed residual, residual kg per product kg and product-recovery fraction. Negative residuals and recovery above one are retained.
residualN = Σinputs−productN−soilStockChange; recovery = productN/Σinputs Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| totalDeclaredReactiveNitrogenInputKg | Total declared reactive nitrogen input kg | number |
| signedUnaccountedNitrogenKg | Signed unaccounted nitrogen kg | number |
| signedUnaccountedNitrogenKgPerProductKg | Signed unaccounted nitrogen kg per product kg | number |
| harvestedNitrogenRecoveryFraction | Harvested nitrogen recovery fraction | number |
{
"input": {
"reactiveNitrogenInputMassesKg": [
10,
20
],
"harvestedProductNitrogenKg": 15,
"soilNitrogenStockChangeKg": 5,
"marketableProductMassKg": 5
},
"output": {
"totalDeclaredReactiveNitrogenInputKg": 30,
"signedUnaccountedNitrogenKg": 10,
"signedUnaccountedNitrogenKgPerProductKg": 2,
"harvestedNitrogenRecoveryFraction": 0.5
}
}Limitations and assumptions
Inputs, outputs and stock changes must share a period and boundary. The tool does not attribute residuals to air or water losses or certify an environmental footprint.
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 Fertilizer Requirement Nitrogen: Balance caller crop N uptake/available soil/other credits with explicit recovery/product fractions; a simple accounting scenario, not agronomic sufficiency, environmental permission or application recommendation. For a complementary task, use Agriculture Manure Nutrient Content: Account declared independent dry-basis manure nutrient components from wet mass and model first-year availability; elemental/oxide bases must be consistent and release fractions are not nutrient sufficiency recommendations.
References
-
Agriculture Nitrogen Footprint — tool.io
Similar or alternative tools
- Agriculture Fertilizer Requirement Nitrogen
Balance caller crop N uptake/available soil/other credits with explicit recovery/product fractions; a simple accounting scenario, not agronomic sufficiency, environmental permission or application recommendation.
- Agriculture Manure Nutrient Content
Account declared independent dry-basis manure nutrient components from wet mass and model first-year availability; elemental/oxide bases must be consistent and release fractions are not nutrient sufficiency recommendations.