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Root Zone Available Water Storage

Online root zone available water storage. Volumetric soil-water fractions, not gravimetric percentages.

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root zone available water storage calculator online

Use root zone available water storage online for field capacity p, wilting point p, root depth m. Volumetric soil-water fractions, not gravimetric percentages. Planning estimate using supplied crop, soil or material parameters. Growth, weather and application suitability are not predicted.

How to use it

Enter field capacity p. Set wilting point p, root depth m. Select Calculate and check the labeled output. Copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
field capacity pMain input. Zero or positive values. Maximum 1.0.3
wilting point pOption. Zero or positive values. Maximum 1.0.15
root depth mOption. Positive values. 0.5

Calculation method

available_water_mm = positive(field_capacity_p-wilting_point_p)*root_depth_m*1000 (^ means exponentiation; trig functions ending in d use degrees).

Worked examples

Apply root zone available water storage to the case below, keeping the displayed units and assumptions. Volumetric soil-water fractions, not gravimetric percentages.

Root Zone Available Water Storage — worked case

Settings: wilting point p: 0.15; root depth m: 0.5

Input:

0.3

Calculated result for these inputs:

Output:

{
  "available_water_mm": 75
}

Choose the right tool

Choose spacing tools for layouts and water tools for explicit area, flow and depth. Crop coefficients, soil properties, declared nutrient percentages and application rates must come from suitable local or product-specific information.

Limitations and common mistakes

  • Volumetric soil-water fractions, not gravimetric percentages. Planning estimate using supplied crop, soil or material parameters. Growth, weather and application suitability are not predicted.
  • Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.

Frequently asked questions

How can I use root zone available water storage calculator online?

Enter field capacity p. Set wilting point p, root depth m. Select Calculate and check the labeled output. Copy or download the JSON result.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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