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Irrigation Frequency
This calculates the maximum interval allowed between irrigations. This is dependent on soil type, root zone depth, and the water use rate of the crop.
Irrigation Frequency
The Equation
This is the formula this calculator uses to determine the suggested irrigation frequency.
Where:
= Suggested irrigation frequency (day)
= Soil's available water holding capacity (in/ft)
= Root Zone Depth (ft)
= Management Allowable Depletion
= Crop water use rate (in/day)
Reference: Washington State University
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