Question

Which of the following are \( \text{N}_2 \) fixing biofertilizers?
(A). Rhizobium spp.
(B). Mycorrhizae
(C). Azospirillum spp.
(D). Penicillium bilaii
Choose the correct answer from the options given below:

• (A) and (D) only.
• (B) and (D) only.
• (A) and (C) only.
• (B) and (C) only.

Hint:

Categorize biofertilizers into three main functional groups:
1. Nitrogen Fixers: Rhizobium, Azotobacter, Azospirillum, Blue-Green Algae, Azolla.
2. Phosphorus Solubilizers: Bacillus polymyxa, Pseudomonas striata, Penicillium bilaii.
3. Phosphorus Mobilizers: Mycorrhizae (VAM).

Answer 1

The Correct Option is C