Field water used efficiency is calculated by

A. WUE = $$\frac{{\text{Y}}}{{{\text{WR}}}}$$

B. WUE = $$\frac{{\text{Y}}}{{{\text{ET}}}}$$

C. WUE = $$\frac{{\text{Y}}}{{{\text{CU}}}}$$

D. None of these

Answer: Option B

Solution(By Examveda Team)

The field water use efficiency (WUE) is the ratio between the dry matter production of a plant (the output) divided by evapotranspiration. Thus the equation for WUE is:
WUE = $$\frac{{\text{Y}}}{{{\text{ET}}}}$$
Y = Dry matter production (Kilogram/hectare)
ET = Evapotranspiration (in mm)