Which element do lentils and other legumes help fix in the soil to help plants grow?

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A Nitrogen
B Carbon dioxide
C Oxygen
D None of the above

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Answer: A. Nitrogen

Plants need nitrogen to grow, but they cannot use the nitrogen gas in the air directly. Lentils and other legumes have Rhizobium bacteria in their root nodules that fix nitrogen from the air into the soil in a form plants can use.

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Which element do lentils and other legumes help fix in the soil to help plants grow?

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