Question

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

Answer 1

Because these crops have rhizobium bacteria which fixes the atmospheric nitrogen which can be taken by the soil

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Answer 2

Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilisers during cultivation

Explanation:

• Plants such as grams and pulses have a special type of bacteria in their roots which transforms atmospheric nitrogen into compound. and therefore there is no need of nitrogenous fertilizers.
• That is, the pulses and grams' roots (leguminous plants) have a symbiotic relation to a bacteria known as  "Rhizobium" that fixes nitrogen. Therefore, farmers do not use nitrogenous fertilisers at the time of cultivation.