Q. Explain the scientific reason for growing aleguminous crop like groundnut prior to a cereal crop?

Hello Student,
Please find answer to your question below:

Growing a leguminous crop like groundnut prior to a cereal crop becauseLeguminous plants have leguminous roots. Rhizobium sativum symbiotic bacteria live in the nodules of roots. These bacteria fix nitrogen in the nature and increase the fertility of soil.