What are blue green algae? In which crop, blue green algae are recommended as a biofertilizer?

What are blue green algae? In which crop, blue green algae are recomme

1.	What are blue green algae? In which crop, blue green algae are recommended as a biofertilizer?
Answer» Blue green algae or cyanobacteria are photosynthetic prokaryotic microorganisms capable of fixing atmospheric nitrogen. They make a substantial contribution in the nitrogen economy of crop production. The predominant genera of nitrogen fixing BGA are Anabaena, Nostoc, Calothrix and Tolypothrix. Blue green algae are recommended for lowland rice. In submerged rice fields, BGA is applied one week after transplanting at rate of 10 Kg /ha and the field is flooded with 2.5 to 5 cm deep water.