Question

Azolla is used as a bio fertilizer as it has

• A. Rhizobium
• B. Cyanobacteria
• C. Mycorrhiza
• D. Large quantity of humus

Answer 1

The correct option is B

Cyanobacteria

Bio fertilizers are live organisms that continue to provide nutrients while they are living. They also provide living microorganisms to the soil, producing gums, waxes, and resins that are resistant to decomposition, helping to help bind together soil particles as granules or aggregates. Azolla is a very good example of bio fertilizer as it has nitrogen fixing filamentous cyanobacteria- anabena.