11) A part of water which will move out of the soil, if proper drainage is provided, is known as gravitational water.

• (a) True
• (b) False

12) Super-fluous water is also called

• (a) capillary water
• (b) gravitational water
• (c) hygroscopic water
• (d) all of these

13) Irrigation is supplementary to rainfall.

• (a) Agree
• (b) Disagree

14) Irrigation ................. the chances of water logging.

• (a) increases
• (b) decreases

15) Irrigation is said to be a science of survival.

• (a) Correct
• (b) Incorrect