| Sample name | Treatment | Rate of application | Designation |
| Biomass | Cowdung biomass | 5 t/ha | CM |
| Poultry manure biomass | 5 t/ha | PM | |
| Sewage sludge biomass | 5 t/ha | SM | |
| Biochar | Cow dung biochar | 5 t/ha | CC |
| Poultry manure biochar | 5 t/ha | PC | |
| Sludge biochar | 5 t/ha | SC | |
| Control | No treatment | None | Cont |