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Which of the following crops is suitable for crop rotation to enrich soil deficiency of nitrogen?

1. Wheat
2. Maize
3. Alfalfa
4. Napier grass

Correct answer: Alfalfa

Solution

Alfalfa is a leguminous crop, and legumes host nitrogen-fixing bacteria in their root nodules. This helps enrich the soil with nitrogen, making it suitable for crop rotation.

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