Question

Which among the following differentiates fertilisers from manures?

• A. Increase of crop yield
• B. Can lead to water pollution
• C. Increase water holding capacity of soil
• D. Improvement of soil structure

Answer 1

The correct option is B Can lead to water pollution

$\bullet$ Manures are the organic substances obtained by the decomposition of animal excreta and plant waste. Adding manure is a natural way of increasing soil fertility and in turn increasing the yield.
$\bullet$ Fertilisers are artificially synthesised inorganic compounds which also increase yield. Excessive use of fertilisers kill the useful micro-organisms present in the soil. They can runoff into the nearby water bodies which would result in water pollution.