Question

'X' is a source of nutrients for plants. It is prepared by the decomposition of plant waste and animal excreta. Given below are few uses of X. Identify the one which is not a use of X.

• A. It prevents weathering of rocks.
• B. It increases soil fertility.
• C. It increases water holding capacity.
• D. It increases soil microflora.

Answer 1

The correct option is A It prevents weathering of rocks.

'X' in this case refers to manures. Manures are organic substances formed by the decomposition of the animal excreta and plant waste. It improves the soil structure so that the soil holds more nutrients and water, therefore becomes more fertile.
Manure is not related to the prevention of rock weathering.