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The underirrigation factor is used to change the target soil depletion to achieve a reduction in water use compared to potential. The factor refers to the percentage of the tension water (RAW - TAW) when it is larger than zero. The underirrigation is only assessed on planting decision day and remains the same throughout the planting period. This option may be used where you are trying to keep a crop alive and not maximise production ie. stressing the crop and getting a reduced yield.
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Underirrigation Factor replaces ignores the functions of Soil Depletion Target and Target Modifier when it is greater than zero. |
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