For a irrigated field having : Field capacity = 30%, Permanent wilting – McqOptions

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1.	For a irrigated field having : Field capacity = 30%, Permanent wilting point = 10%, Permissible depletion of available moisture = 50%, Dry weight of soil = 14.70 kN / m3, Unit weight of water = 9.8 kN / m3 and Effective rainfall = 30 mm, what is the net irrigation requirement per meter depth of soil?
A.	300 mm
B.	150 mm
C.	120 mm
D.	90 mm
Answer» D. 90 mm

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