Question

Why have legumes been planted as a cover crop to improve the soil fertility of a field?

A) Legumes aid organic decomposition.

B) The leaves of legumes absorb more nitrogen than other plants.

C) Legumes need about 100 times less nitrogen than other plants.

D) Legumes have carbon-fixing bacteria in their root nodules.

E) Legumes have nitrogen-fixing bacteria in their root nodules.

Answer

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