Question

Which Rhizobium species fixes nitrogen in the soybean crop?

• A. Rhizobium meliloti
• B. Rhizobium lupini
• C. Rhizobium phaseoli
• D. Rhizobium japonicum

Hint:

Rhizobium japonicum is one of the key nitrogen-fixing bacteria that aids in sustainable farming practices for leguminous crops like soybean.

Answer 1

The Correct Option is D

The Rhizobium species Rhizobium japonicum is primarily responsible for fixing nitrogen in soybean crops. It forms a symbiotic relationship with the roots of soybean plants, where it helps in nitrogen fixation, benefiting the plant with a vital nutrient.