Description
Return dryMass*nutrientFraction*returnedFraction.
Tree and crop material budgets distinguish wet mass, dry biomass, nutrient mass and carbon mass. A belowground-to-aboveground ratio differs from a total biomass multiplier, while returned nutrient differs from plant-available nutrient. Material accounting requires an explicit mass and reporting-area basis.
Return dryMass*nutrientFraction*returnedFraction.
When to use this tool
Use Tree Crop Litter Nutrient Return Factor when checking the stated woody material, litter, nutrient or carbon basis.
How to use the tool and how it works
- Enter litterDryMass, nutrientFraction, returnedFraction. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read returnedNutrient. Use the output convention below.
Require nonnegative litter dry mass and nutrient/returned fractions in [0,1]. Return dryMass*nutrientFraction*returnedFraction.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| litterDryMass | Litter Dry Mass | Required. Finite number; minimum 0. |
| nutrientFraction | Nutrient Fraction Unit: 1. | Required. Finite number; minimum 0; maximum 1. |
| returnedFraction | Returned Fraction Unit: 1. | Required. Finite number; minimum 0; maximum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| returnedNutrient | Returned Nutrient | Required. Finite number. |
{
"input": {
"litterDryMass": 100,
"nutrientFraction": 0.02,
"returnedFraction": 0.5
},
"output": {
"returnedNutrient": 1
}
}Limitations and assumptions
- Nutrient fraction is on dry litter mass; returned nutrient is not necessarily plant-available or a fertilizer requirement.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified biomass and composition measurements and a complete suitable nutrient/carbon model for stocks, sequestration or agronomic management decisions.
References
Similar or alternative tools
- Residue Return Nitrogen Basis
Return wet*dryFraction*returnedFraction and multiply by dryNitrogenFraction for returned nitrogen.
- Legume Residue Nitrogen Supplied Factor
Return dryMass*nitrogenFraction and multiply by both process fractions for availableNitrogen.