Question

Which of the following can be added to the soil to improve its fertility?

• A. Manure
• B. Water
• C. Fertilisers
• D. Common salt

Answer 1

Answer: (A), (C)

The correct options are
A

Manure

C

Fertilisers

Soil fertility is naturally maintained by soil microorganisms and other organisms like earthworms, termites, and algae living in it. Soil fertility can also be improved by the addition of manures and fertilisers. Manures are natural organic compounds, such as the cow dung. Fertilisers are chemicals that are rich in a particular nutrient required for soil fertility. Addition of common salt does not increase the fertility of the soil. It increases the salinity, which is not good for plant growth. Addition of water does not have any influence on soil fertility.