Answer:

because the plants that they are cultivating are nitrogenous plants.

Explanation:

these plants roots contain Rhizobium bacteria which convert atmospheric nitrogen to nitrogenous compounds that are taken by plants.

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Answer:

nitrogen is an essential nutrient for plant growth. but farmers to cultivate pulse crop green gram, Bengal gram ,black gram etc do not apply nitrogenous fertilizers during cultivation. it's because of amount of nitrogen is present in the soil that helps the plant growth

Explanation:

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