Question

Vegetation cover or grass-cover _____________

(a) increases the field capacity

(b) decreases the field capacity

(c) may increase or decrease the field capacity

(d) have no effect on field capacity

I got this question in a job interview.

My question comes from Ground Water through Wells and Tubewells in section Ground Water for Irrigation through Wells and Tubewells of Irrigation Engineering

Answer 1

Correct answer is (a) increases the field capacity

The best explanation: Grass cover or vegetation cover increases the field capacity by trapping water and reducing the effect of raindrop compaction. Vegetation and grass cover also reduces the surface compaction of the soil which again allows for increased infiltration.