Salinity Rootzone Leaching Fraction Vineyard Calculator
Steady-state LR = ECw/(5 ECe - ECw) screening approximation for caller applicable salinity conditions, not universal vineyard leaching advice.
Description
Calculate a conditional salinity leaching fraction from irrigation and target soil EC.
A simplified salinity leaching relationship can be evaluated from irrigation-water EC and a chosen target soil EC. It is a conditional model result rather than a site-specific irrigation design.
When to use this tool
Calculate a conditional salinity leaching fraction from irrigation and target soil EC. Use it when the input measurements and conventions below match the operation you need.
- Prepare irrigationEcDsM, targetSoilEcDsM, respecting the measurement basis and boundaries below.
- Compare the worked example with your intended operation before reusing its result.
How to use the tool and how it works
- Enter every field in the input table using the stated units and exact supported selector spelling where applicable.
- Run the tool. Correct input errors before interpreting an output.
- Read the result fields below; use accompanying flags and the stated sign, boundary or model convention when interpreting a number.
Irrigation EC must be nonnegative and target soil EC positive. The fraction is ECw divided by (5 times ECe minus ECw), with a positive denominator required. Inputs implying a fraction above one are rejected.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| irrigationEcDsM | Irrigation ec ds m. Decisiemens per meter. | Finite number; zero or greater |
| targetSoilEcDsM | Target soil ec ds m. Decisiemens per meter. | Finite number; greater than zero |
| Output field | Interpretation |
|---|---|
| result | Object containing the following named result fields. |
| result.conditionalLeachingFraction | Conditional leaching fraction; use the stated units and sign convention. |
{
"input": {
"irrigationEcDsM": 1,
"targetSoilEcDsM": 2
},
"output": {
"result": {
"conditionalLeachingFraction": 0.1111111111111111
}
}
}Limitations and assumptions
- The target and EC measurement conventions must already be applicable. Soil drainage, salinity distribution, rainfall, ion toxicity and crop response are not independently evaluated.
- Every declared field is required and unexpected fields are rejected. Numeric inputs must be finite; input errors are distinct from a valid false result or an explicitly qualified output.
- Extremely large inputs and nonfinite or excessively large outputs are rejected. List positions reported by the tool use zero-based indices unless stated otherwise.
Alternative or Complementary methods
Compare the result with actual block measurements, soil or crop observations and the declared management basis. Use a site-specific model when effects omitted here materially affect the decision. Compare the scope of the nearby tools below before substituting one.
References
Similar or alternative tools
- Regulated Deficit Irrigation ET Fraction Calculator
Conditional gross irrigation depth from reference ET, caller crop coefficient and deficit fraction; not an irrigation prescription.
- vineyard block area conversion
A vineyard block's surveyed area can include paths, borders or other land beyond planted rows.