Question

Nitrogen is an essential nutrient for plants growth but farmer who cultivate pulse, crops like green gram, bengal gram etc do not apply fertilizer during cultivation why

Answer 1

because they all are leguminous crops . they have bacteria on their nodules.nodules are the root of the plant.bacteria takes the nitrogen from the air and fixes it into the soil. these microorganisms act as a biofertilizer that why we do not apply any fertilizer during cultivation.