Question

Nitrogen is an essential nutrient for plant growth. But farmerswho cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation. Why?

Answer 1

NITROGEN is an essential nutrient for plant growth but farmers who grows leguminous  plants don't need to add nitrogenous fertilizer because  Legumes are notable in that most of them have symbiotic nitrogen-fixing bacteria in structures called root nodules. For that reason, they play a key role in crop rotation.Many legumes contain symbiotic bacteria called Rhizobium within root nodules of their root systems which helps in nitrogen fixation in the soil