The data for an agricultural field for a specific month are given below: Pan Evaporation=100 \mathrm{~mm} Effective Rainfall $=20 \mathrm{~mm}$ (after deducting losses due to runoff and deep percolation) Crop Coefficient $=0.4$ Irrigation Efficiency $=0.5$The amount of irrigation water (in $\mathrm{mm}$ ) to be applied to the field in that month, is
(A) 0
(B)20
(C) 40
(D) 80
The data for an agricultural field for a specific month are given below: Pan Evaporation=100 \mathrm{~mm} Effective Rainfall $=20 \mathrm{~mm}$ (after deducting losses due to runoff and deep percolation) Crop Coefficient $=0.4$ Irrigation Efficiency $=0.5$The amount of irrigation water (in $\mathrm{mm}$ ) to be applied to the field in that month, is
(A) 0
(B)20
(C) 40
(D) 80