Allowed Depletion tells the system how “dry” to let the zone get before watering. This is influenced by your crop type.
What value should my Allowed Depletion be?
- Increasing Allowed Depletion, will allow the zone get drier (which will result in less frequent, longer watering).
- Lowering Allowed Depletion will allow the zone to be watered more frequently.
Also related to this is How do I determine my crop type?