A) Help in \[N{{O}_{2}}\] fixation
B) Not help in \[N{{O}_{2}}\] fixation
C) Increased soil fertility
D) All of these
Correct Answer: C
Solution :
The bacteria (Rhizobium spp.) associated with the root nodules of legumes fix atmospheric nitrogen. It helps in increase of soil fertility because they are rich in nitrogen and adds nitrates in the soil.
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