Organisms involved:
(i) Nitrogen fixation
- Free-living cyanobacteria-Nostoc
- Free lining aerobic bacteria – Azotobacter, Beidernickia
- Free-living anaerobic bacteria – Clostridium, Rhodospririllum
- Symbiotic bacteria – Rhizobium, Frankia
(ii) Ammonification Pseudomonas
(iii) Nitrification Nitrobacter, Nitrosomonas, Nitrosococcus
(iv) Denitrification Thiobacillus, Pseudomonas.
