Question

What are the methods by which nutrients in the soil can be replenished?

Answer 1

Nutrients in the soil can be replenished by three methods:
1. By applying fertilisers rich in nitrogen, phosphorous and potassium in the fields, depending on the soil and crop requirements.
2. By adding manure, which is obtained by the decomposition of plant residues and animal wastes.
3. By growing leguminous crops such as peas, pulses and beans. The Rhizobium bacteria present in the roots of the leguminous crops help in fixing atmospheric nitrogen into a form that can be used by plants.