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Question

Why are leguminous plants often used in crop rotation 


Your Answer
A
Leguminous plants take up less nutrients 
Your Answer
B
Leguminous plants keep away the pests 
Correct Answer
C
Leguminous plants fix nitrogen 
Your Answer
D
None of the above 

Solution

The correct option is A 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.

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