The organisms which are used to enrich the nutrient quality of the soil are called
Bacteria
Cyanobacteria
Fungi
All of these
Why are blue green algae not popular as biofertilisers ?
Which of the following is free living aerobic and nonphotosynthetic nitrogen fixing bacterium
What would happen if oxygen availability to activated sludge flocs is reduced ?
Azotobacter and Bacillus polymyxa are