All drainage / leaching is estimated to 600 mm depth for all blocks. This informs the nutrients lost estimates Leaching - Urine Patches and Leaching - other that are listed under Leached From Root Zone in the Whole Farm and Block Nutrient Budget(s).
For crops, plant available water for transpiration is dependent on water content to 1500 mm or the default rooting depth for the crop or the impeded depth, whichever is smaller. Soil water for evaporation is dependent on the top 10cm water content.
Estimating drainage / leaching at the same depth for all blocks provides alignment of the crop and pastoral block models. In particular, the urine N model and estimation of irrigation depths now operates consistently across all blocks. This change also provides a clear framework to model N removal by deeper rooting crops.