Which of the following crops would be preffered for sowing in order to enrich the soil with nitrogen? A. Wheat B. Mustard C. Sunflower D. Gram

The correct answer is D. Gram.

Gram

is a legume, which means it is a member of the pea family. Legumes have a special relationship with bacteria in the soil called rhizobia. These bacteria live in nodules on the roots of legumes and fix nitrogen from the air, making it available for the plant to use. This process is called nitrogen fixation.

Nitrogen is an essential nutrient for plants. It is a component of proteins, nucleic acids, and chlorophyll. Plants need nitrogen to grow

and produce healthy crops.

Sowing legumes, such as gram, can help to enrich the soil with nitrogen. This can benefit other crops that are grown in the same soil in the future.

Wheat, mustard, and sunflower are not legumes. They do not have the same relationship with rhizobia as legumes do. Therefore, they do not fix nitrogen from the air and do not enrich the soil with nitrogen in the same way that legumes do.