Question

Azolla pinnata has been found as an important biofertilizer for paddy crops. This quality is due to presence of

• A. Bacteria
• B. Cyanobacteria
• C. Fungi
• D. All of the above

Answer 1

Answer: (B)

Cyanobacteria

Azolla pinnata is a species of fern known by several common names, including feathered mosquito fern and water velvet. Azolla pinnata has been found as an important biofertilizer for paddy crops.

Rice farmers sometimes keep this plant in their paddies, because it generates valuable nitrogen via its symbiosis, Cyanobacteria. The plant can be grown in wet soil and then plowed under, generating a good amount of nitrogen-rich fertilizer.

Thus, the correct answer is option B.