Gate 2020 question with solution

1) He data for an agricultural field for a specific month are given below: Pan Evaporation = 100 mm Effective Rainfall = 20 mm (after deducting losses due to runoff and deep percolation) 
Crop Coefficient = 0.4 
Irrigation Efficiency = 0.5 
The amount of irrigation water (in mm) to be applied to the field in that month, is  

Solution : Water required by crop = 100 × 0.4 mm 
                                = 40 mm 
Effective rainfall = 20 mm 
Additional water requried = 20 mm 

Amount of water required after accounting irrigation efficiency = 20/0.5 =40 mm.

Gate 2020 question with solution

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