Question

Legume crops enrich the soil fertility by:

• A. Potassium fixation
• B. Phosphorous fixation
• C. Nitrogen fixation
• D. Sulphur fixation

Hint:

Legumes = nitrogen fixers. Think “Rhizobium in root nodules” to remember this soil-enriching mechanism.

Answer 1

The Correct Option is C

Legume crops (such as beans, lentils, and peas) have symbiotic relationships with nitrogen-fixing bacteria (like Rhizobium) in their root nodules. These bacteria convert atmospheric nitrogen into a usable form for plants, thereby enhancing soil nitrogen content and fertility.