Question

why are cynobacteria used as biofertilizers?

Answer 1

Cyanobacteria, or blue-green algae, is a bio-fertilizer, a type of organic fertilizer which contains living organisms and harnesses naturally occurring inputs like solar energy, nitrogen, and water to ensure soil fertility and plant growth. 

Small-scale farmers using bio-fertilizers have the potential to provide larger and more sustainable yields and healthier soils for themselves and their communities.

Answer 2

Cynobacteria or blue-green algae is rich in nitrogen which helps the plants to grow fastly .. So It is used as biofertilizers.