CBSE Class 12-science Answered
Cyanobacteria can fix atmospheric nitrogen. The soil conditions in paddy fields provide suitable environment for the growth of nitrogen fixing cyanobacteria. Cyanobacteria act as important biofertilisers. They also add organic matter to the soil and increase its fertility.
Biofertilisers- Azolla-AnabaenaThis video discusses the use of Azolla-Anabaena as biofertilisers.
Biofertilisers- CyanobacteriaThis video discusses why cyanobacteria are not preferred as biofertilisers.