Plant available soil water maps for fallow are produced from March to June for different soil types using the Ritchie two-layer fallow evaporation model run from the first of November in the previous year.
Plant available soil water maps for crop are produced from July to October for different soil types using evapotranspiration of a generic wheat crop is estimated using the FAO crop factor method,
where the timing of crop germination (break of season) is estimated using a two-part rule.
For up to date graphs of plant available soil water, and for more infomation on the models behind the maps in either a cropped or fallow paddock,
use the Soil water tool.
Plant available soil water maps