Question

Sub-irrigation is used in areas with:

(a) Low water table

(b) High water table

(c) Sloping terrain

(d) Flat terrain

The question was asked during an interview for a job.

My doubt is from Types of Irrigation in chapter Other Major Topics in Civil Engineering of Basic Civil Engineering

Answer 1

Right answer is (b) High water table

The explanation is: Sub-irrigation is a method of artificially raising water table to allow the soil to be moistened from below plant’s root zone. It is also used in commercial greenhouse production.