Question

what are the disadvantages of using fertilisers​

Answer 1

Explanation:

They are expensive.

The ingredients in the fertilizers are toxic to the skin and respiratory system.

Excessive use of fertilizers damages the plants and reduces soil fertility.

Leaching occurs and the fertilizers reach the rivers causing eutrophication.

Answer 2

Cause water pollution, if followed by excessive irrigation

Cause water pollution, if followed by excessive irrigationExcessive use can spoil soil fertility (organic matter & micro-organisms are harmed)