Where WUE is the water use efficiency (kg m-3), Y represents the yield under the planting area, W1 means the water consumption of crops, and n1 and n2 are the planting area and catchment area, respectively.
Where WUE is the water use efficiency (kg m-3), Y representsthe yield under the planting area, W1 means the waterconsumption of crops, and n1 and n2 are the planting areaand catchment area, respectively.