Q. Which of the following serve as biofertiliser in paddy fields?
A) Anabaena
B) Azospirillum
C) Nostoc
D) Both (a) and (c)
Explanation
Nostoc, Anabaena and Oscillatoria are cyanobacteria. They fix atmospheric nitrogen and increase the organic matter of soil through their photosynthetic activity. Blue-green algae increase the soil fertility by adding organic matter to the soil
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.