...
The Plant Date defines when the crop is established.
...
Underirrigation Factor
The under irrigation underirrigation factor is used to adjust change the target soil depletion to achieve a reduction in water use compared to potential. 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..
| Equation 16 |
where:
UFactor is user specified under irrigation factor
TargetDepletionRegulated is target soil water depletion (mm)
| Info |
|---|
Underirrigation Factor replaces Soil Depletion Target and Target Modifier when it is greater than zero. |
Planting Decision Reassessment Trigger
...
Zfallow is depth of the fallow (m)
...
Target Modifiers
Irrigator behaviour can change during the year. For example, in grazing industries, less water may be applied coming into winter to reduce the risk of water logging. Another example is the horticultural industry when a fruit crop has been harvested, irrigation intensity can be reduced to a maintenance level without impact on yield.
Irrigation Target modifiers are included into Source to allow a simple mechanism to reduce irrigation intensity for recurring periods of time. Basically, this allows a simple way of modifying the target level. This is achieved by the user defining a reduction in irrigation application over a date range. The % reduction in irrigation is used to modified modify the target depletion level during the selected date range.
...