| Treatment | Fertilizer/Organic residue | Total C (mg∙g−1) | Total N (mg∙g−1) | C:N | N applied @ 10 t∙ha−1 |
| T1 | NPK (control) | -- | 4.0 | -- | 40 kg∙N∙ha−1 |
| T2 | Cow manure (CD) | 300.0 | 12.0 | 25 | 120 kg∙N∙ha−1 |
| T3 | Rice straw (RS) | 446.9 | 10.9 | 41 | 109 kg∙N∙ha−1 |
| T4 | Poultry manure (PM) | 135.0 | 9.0 | 15 | 90 kg∙N∙ha−1 |
| T5 | Sugarcane bagasse (SCB) | 410.9 | 3.8 | 108 | 38.04 kg∙N∙ha−1 |