Lime Application Tonnes/ha pH Shift Calculator
Extract observed lime trial dose/pH-change contrast from already applied material, not a lime prescription or causal buffering/soil-response guarantee. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
A liming-response fit relates paired before/after pH differences to already applied doses.
A liming-response fit relates paired before/after pH differences to already applied doses.1
The observed slope summarizes a supplied dataset and does not determine a safe or appropriate new application rate. Use this tool to calculate lime application tonnes/ha ph shift from the supplied measurements and assumptions.
When to use Lime Application Tonnes/ha pH Shift Calculator
Use this tool to calculate lime application tonnes/ha ph shift from the supplied measurements and assumptions. Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.
How to use Lime Application Tonnes/ha pH Shift Calculator and understand its results
- Establish the species/site, survey protocol, units, sampled area or exposure, and the independently chosen reference or model.
- Enter observedAlreadyAppliedLimeTonnesHa, observedBeforeSoilPh, observedAfterSoilPh, using the field meanings and rules below, then run the tool.
- Read observedPhResponsePerAppliedTonneHa, responseFitRSquared. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedAlreadyAppliedLimeTonnesHa | Observed already applied lime tonnes ha | list of number | Required |
| observedBeforeSoilPh | Observed before soil ph | list of number | Required |
| observedAfterSoilPh | Observed after soil ph | list of number | Required |
Enter at least two aligned nonnegative already applied lime doses and before/after pH values from 0 through 14. Compute after−before pH and fit that change against dose with nonzero predictor variance. Return slope in pH units per tonne/ha and R²; no new dose or extrapolation recommendation is computed.
deltaPh_i=afterPh_i−beforePh_i; responseSlope=OLS(doses,deltaPh).slope Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| observedPhResponsePerAppliedTonneHa | Observed Ph Response Per Applied Tonne Ha; follow the units, sign, ordering and evidence convention stated above | number |
| responseFitRSquared | Response Fit R Squared; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"observedAlreadyAppliedLimeTonnesHa": [
0,
1,
2
],
"observedBeforeSoilPh": [
5,
5,
5
],
"observedAfterSoilPh": [
5,
5.2,
5.4
]
},
"output": {
"observedPhResponsePerAppliedTonneHa": 0.20000000000000018,
"responseFitRSquared": 1
}
}Limitations and assumptions
The observed slope summarizes a supplied dataset and does not determine a safe or appropriate new application rate. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Site Index Calculator for this related task: Site index expresses height at a specified reference age under an adopted species and region model.
Use Provenance Transfer Latitude Equivalent Calculator when its separate inputs and assumptions fit the question: A temperature gradient per degree of latitude can express a chosen climatic-equivalence scale.
References
Similar or alternative tools
- Site Index Calculator
Site index expresses height at a specified reference age under an adopted species and region model.
- Provenance Transfer Latitude Equivalent Calculator
A temperature gradient per degree of latitude can express a chosen climatic-equivalence scale.