Legumes fails to develop nodule if pH is less than

A. 4.5

B. 5

C. 6

D. 7

Answer: Option B

Solution(By Examveda Team)

Legumes are the plants that form roots nodules in association with the rhizobium bacteria. The free-living soil bacteria grows near the roots of the legumes and is unable to fix nitrogen in a free condition.
The formation of nodules is more sensitive to soil acidity than other aspects of plants. Legumes fail to develop nodules if pH is less than 5.