Question

Azospirillum, a widely used nitrogen-fixing biofertilizer specifically promoted to enhance the growth of non-leguminous crops such as cereals, millets, and grasses, establishes its beneficial nitrogen-fixing association with the host plant specifically through:

A The formation of specialized root nodules similar to those formed by Rhizobium
B A loose, non-nodular associative relationship formed in and around the rhizosphere
C Colonization restricted exclusively to the plant's above-ground leaf tissue
D An association that occurs exclusively in aquatic environments, away from plant roots
E An association that forms only inside stored seeds, prior to germination
Practice Next

Hey! Ask a query

🎓
Think You're Ready for RBI Grade B?
RBI Grade B 2026 Phase 1 Memory Based Paper
  • 200 Questions with Detailed Solutions
  • Section-wise Coverage (GA, English, Quant & Reasoning)