Assertion :Sowing a legume crop between two successive cereal crops in the same field improves the total yield. Reason: Legumes harbour nitrogen-fixing bacterium Rhizobium in their root nodules.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Leguminous plants have nodules in their roots. These nodules harbour Rhizobium bacteria, which convert atmospheric nitrogen into plant usable form. This process is called as nitrogen fixation. Thus, planting legume crops between two successive cereal crops improves soil fertility by increasing the nitrogen content of soil. Thus, the correct answer is option A.

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