Soil Moisture Deficit Calculator

Calculate soil moisture deficit and MAD-based irrigation triggers from sensor data, field capacity, and crop ET.

Field capacity (%vol)

Wilting point (%vol)

Current soil moisture (%vol)

Root zone depth (ft)

Allowable depletion (%)

Crop ET (in/day)

Sensor depth (in)

Tab to move between fields

Plant available water capacity (in)

5.4

Soil moisture deficit (in)

2.88

Current plant available water (in)2.52

Current depletion (%)53.3

MAD trigger depth (in)2.7

Irrigation needed now? (1=Yes)1

Days until trigger0

Recommended application (in)2.88

Trigger sensor reading (%vol)22.5

Relative water content (%)46.7

How to Use This Calculator

Enter Field capacity (%vol), Wilting point (%vol), and Current soil moisture (%vol).
Set Root zone depth (ft), Allowable depletion (%), and Crop ET (in/day).
Adjust Sensor depth (in) as needed.
Review Plant available water capacity (in) and Soil moisture deficit (in).
Use Current plant available water (in) and Current depletion (%) to inform your decision.

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