Question

Why are leguminous plants often used in crop rotation

• A. Leguminous plants take up less nutrients
• B. Leguminous plants keep away the pests
• C. Leguminous plants fix nitrogen
• D. None of the above

Answer 1

The correct option is C Leguminous plants fix nitrogen

Legumes have bacteria on nodules which are on the roots of the plant. The bacteria on the nodules take nitrogen from the air and fixes it into the soil so that other plants(when there is crop rotation) that require nitrogen can use it as well.