Question

Nitrogen is an essential nutriant for plant growth.butcfarmers who cultivate pulse crops like grèn gram,black gram,etc.do not apply nitrogenous frtilisers during cultivation.why

Answer 1

Roots of pulses (leguminous plants) have a symbiotic association with a bacterium called Rhizobium which fixes nitrogen. Hence, farmers need not use nitrogenous fertilisers.