Question

How can tile drainage help to increase crop yields?

(a) Increases Free Gravity Water

(b) Increases Volume of Soil

(c) Decrease Air Circulation

(d) Increases Water Table Level

This question was posed to me in an interview for job.

This question is from Water Logged Reclamation in division Water Logged Reclamation and Saline Soils for Agricultural Purposes of Irrigation Engineering

Answer 1

Correct choice is (b) Increases Volume of Soil

Explanation: The tile drainage helps in lowering the water table level which in turn increases the crop yields. It also helps in increasing the volume of soil from where the roots of the crops can obtain food.