Agriculture Crop Coefficient Kc Calculator
Infer matched measured ET crop/ET reference intervals, pooled reference exposure not meanKc or species table. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A crop coefficient compares crop ET with matched reference ET.
A crop coefficient compares crop ET with matched reference ET.1
Interval ratios and an exposure-weighted pooled ratio differ from selecting a crop-stage reference table. Use Agriculture Crop Coefficient Kc Calculator to evaluate the supplied inputs under the model explained below.
When to use Agriculture Crop Coefficient Kc Calculator
Use Agriculture Crop Coefficient Kc Calculator to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Agriculture Crop Coefficient Kc Calculator and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed crop et mm, Matched reference et mm using the field table and validation rules below, then run the tool.
- Read Interval crop coefficient kc, Reference exposure weighted kc; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedCropEtMm | Observed crop et mm | array of number | Required; constraints below |
| matchedReferenceEtMm | Matched reference et mm | array of number | Required; constraints below |
Enter nonempty aligned nonnegative observed crop ET and positive matched reference ET in mm. Return per-interval ratios and sum(cropET)/sum(referenceET), equivalent to weighting interval ratios by reference exposure. Zero crop ET is allowed. No crop-stage table, irrigation need or missing weather data is supplied.
intervalKc[i]=cropET[i]/referenceET[i]; weightedKc=ΣcropET/ΣreferenceET Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| intervalCropCoefficientKc | Interval crop coefficient kc | array of number |
| referenceExposureWeightedKc | Reference exposure weighted kc | number |
{
"input": {
"observedCropEtMm": [
2,
6
],
"matchedReferenceEtMm": [
1,
2
]
},
"output": {
"intervalCropCoefficientKc": [
2,
3
],
"referenceExposureWeightedKc": 2.6666666666666665
}
}Limitations and assumptions
Interval ratios and an exposure-weighted pooled ratio differ from selecting a crop-stage reference table. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Agriculture Irrigation Uniformity Coefficient Calculator for a related task: An irrigation uniformity coefficient compares deviations with a weighted mean catch.
Use Agriculture Yield Response To Water Ky Calculator for a related task: Yield response to water compares relative yield loss with a matched evapotranspiration deficit.
References
Similar or alternative tools
- Agriculture Irrigation Uniformity Coefficient Calculator
An irrigation uniformity coefficient compares deviations with a weighted mean catch.
- Agriculture Yield Response To Water Ky Calculator
Yield response to water compares relative yield loss with a matched evapotranspiration deficit.