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Crop Production and Management — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceCrop Production and Management2 Marks
Question
How can nitrogen be replenished in soil naturally$?$
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Answer

Through crop rotation with a leguminous crop the nitrogen can be replenished in soil naturally. The leguminous plants, like peas, beans, soybeans, peanuts, etc., have nitrogen-fixing bacteria in their root nodules. The nitrogen-fixing bacteria, viz., Rhizobium, fixes atmospheric nitrogen $(N2)$ into ammonium $(NH4+)$ which is used by the plants.

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