Question

Farmers in Northern India grow legumes as fodder in one season and wheat in the next season. 

(a) What is this practice known as ?

(b) How does this practice help in the replenishment of soil?

Answer 1

(a) Crop rotation 

(b) The nitrogen-fixing bacteria present in root nodules of leguminous plants is rhizobium bacteria. Rotation of crops (leguminous and non-leguminous crops) in the same field replenishes the soil with nitrogen naturally and increases the soil fertility.