Prelims 2018 · Q82
With reference to agricultural soils, consider the following statements:
- 1.A high content of organic matter in soil drastically reduces its water holding capacity.
- 2.Soil does not play any role in the sulphur cycle.
- 3.Irrigation over a period of time can contribute to the salinization of some agricultural lands.
Which of the statements given above is/are correct?
- (a)1 and 2 only
- (b)3 only
- (c)1 and 3 only
- (d)1, 2 and 3
Show answer
UPSC's answer: (b)
NCERT answers it: Class 12 India: People and Economy, Ch 4 (Water Resources); Class 11 Fundamentals of Physical Geography, Ch 5 (Geomorphic Processes).
India: People and Economy (ch 4): intensive irrigation is raising soil salinity in Punjab, Haryana and western UP (3 true). Fundamentals of Physical Geography (ch 5): organic matter helps soil retain moisture (1 false). Only (b) has 3 without 1. So (b).
Hindi version: UPSC's official question paper (2018), question 82 ↗