11.Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below :

12.With the increase in the quantity of water supplied, the yield of most crops

13.The value of Sodium Absorption Ratio for high sodium water lies between

14.The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be

15.Infiltration rate is always