Which of the following is non symbiotic bio-fertilizer
YAM
Anabaena
Azotobacter
Rhizobium
C.
Azotobacter
Anabaena, Nostoc, Aulosira etc., are agriculturally very important as non-symbiotic bacteria also called free living nitrogen fixing bacteria. VAM, Azotobacter and Rhizobium are symbiotic organisms.
