Q. In paddy fields biological nitrogen fixation is chiefly brought by
A) Cyanobacteria
B) Green algae
C) Mycorrhiza
D) Rhizobium
Explanation
Non-symbiotic nitrogen fixation is carried out by Azotobacter, Clostridium, Azopirillum fungi and cyanobacteria (Nostoc, Anabaena).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.