Which of the following rotation of crops will reduce dependence on the use of chemical fertilizers?

Options

A. Rice and chilli
B. Wheat and potato
C. Potato and rice
D. Gram and rice

Answer

D

Explanation

The process of growing different kinds of crops on a piece of land in a pre-planned succession is known as crop rotation. In the rotation of crops, leguminous crops like pulses, beans, peas, groundnuts and Bengal gram are sown in between the season of cereal crops like wheat, rice, maize etc. This is done because cereals absorb a large amount of nitrogen from soil. When leguminous plants are grown, the nitrogen fixing bacteria present in their root nodules enrich soil again with nitrogen. It ensures continued fertility of soil and increased cereal grains production in next season.