| Factor |
Conditions required |
| Micro organisms |
Aerobic or Anaerobic |
| Natural biological processes of micro organisms |
Catabolism and Anabolism |
| Environmental factors |
Oxygen content Temperature, pH, Electron acceptor/ donor |
| Nutrients |
Carbon , Nitrogen , Oxygen etc |
| Soil moisture |
25-28 % of water holding capacity |
| Type of soil |
Low clay or slit content |
|
