Question

In what chemical ways does tile drainage help in plant growth?

(a) Decreases Alkalinity of Soils

(b) Increases salinity of Soils

(c) Increases Nitrogen

(d) Reduces and Removes Toxic Substances

This question was addressed to me during an online interview.

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

Answer 1

Correct option is (d) Reduces and Removes Toxic Substances

For explanation I would say: Tile drainage helps in reducing and removal of toxic chemicals and substances like sodium and other soluble salts, which harms the growth of plants.