Question

10. 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 fertilizers during cultivation.
Why?
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Answer 1

Answer:this is because these plants already have a bacteria called rhizobium present in their root nodules which helps them in the consumption of nitrogen.

Answer 2

because some amount of nitrogen is also present in the soil which help the plant to grow

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