Total available water (TAW)

Total available water (TAW)

The total water in the crop root zone that is available for crop use. TAW is the difference between field capacity (FC) and the permanent wilting point (PNW) multiplied by the depth of the root zone. Units of expression are generally a volume per unit irrigated area (e.g. acre--inches/acre or inches).

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Part of Speech: noun
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Industry/Domain: Agriculture
Category: Irrigation
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