Question

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 

Answer 1

(b) 3 only

(b) The process of decay, added by bacterial action, transforms organic matter into humus. Humus enhances water retention capacity of the soil.

So, I is wrong. By elimination we are left with Answer (b): 3 only.