how are root nodules formed in leguminous plants?
Kindly refer this link:-
https://www.meritnation.com/ask-answer/question/why-are-root-nodules-useful-for-the-plants/natural-resources/3645696
https://www.meritnation.com/ask-answer/question/why-are-root-nodules-useful-for-the-plants/natural-resources/3645696