Question

How does a soil become rich in nitrates when leguminous plants are grown in it?​

Answer 1

Answer:

Because the rhizobium bacteria present in the roots of the leguminous plants converts the atmospheric nitrogen into a soluble nitrogeneous compound and thus restores the nitrogen content of the soil.

Answer 2

Answer:

lefuminous plant have nodes in which microorganisms such as Nitrosmonus is present which take atmospheric nitrogen and convert it into nitrate which is taken by the soil making it rich in nitrates.