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 ?

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Solution

(a) Farmers in northern India grow legumes as fodder in one season and cereal crops like wheat in other season. this process is called as crop rotation. This helps in the replenishment of the soil with nitrogen.
(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 soil fertility.

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