Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as__________________?

The value of Sodium Absorption Ratio for high sodium water lies between________________?

A. 0 to 10

B. 10 to 18

C. 18 to 26

D. 26 to 34

The “outlet discharge factor” is the duty at the head of_________________?

A. main canal

B. branch canal

C. watercourse

D. distributory

For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?

A. rabi or kharif

B. rabi and kharif or sugarcane

C. rabi and sugarcane or kharif and sugarcane

D. rabi or kharif or sugarcane

The water utilizable by plants is available in soils mainly in the form of________________?

A. gravity water

B. capillary water

C. hydroscopic water

D. chemical water

With the increase in the quantity of water supplied, the yield of most crops_________________?

A. increases continuously

B. decreases continuously

C. increases upto a certain limit and then becomes constant

D. increases upto a certain limit and then decreases