Which of the following is responsible for nitrogen fixation in soybean?

Correct option is C

· Nitrogen Fixation in Soybean: Nitrogen fixation is a biological process where atmospheric nitrogen (N₂) is converted into ammonia (NH₃) by symbiotic bacteria.
· Rhizobium japonicum: This bacterium forms a symbiotic relationship with soybean roots and fixes atmospheric nitrogen into a usable form for the plant.
· The nodules on soybean roots are inhabited by Rhizobium japonicum, which enhances soil fertility and supports plant growth.
· This process reduces the need for nitrogen fertilizers, making soybean cultivation more sustainable.
Thus, the correct answer is (c) Rhizobium japonicum.