Question

How are fertilisers different from manures?

• A. They add nutrients to the soil.
• B. They protect crops from pests.
• C. They cause soil pollution.
• D. They increase the crop production.

Answer 1

The correct option is C They cause soil pollution.

Fertilisers are man-made chemicals while the manure is a mixture of naturally occurring substances like vegetable waste or animal excreta. Both of them are added to soil in order to increase their fertility and thereby its production. They are also used for protecting crops from pests.
But fertilisers when added in excess amounts make the soil infertile and cause soil pollution.