| Fertilization levels | Quantity of manure applied (kg/plot) | Equivalent nitrogen dose (kg N/ha) |
| T0 | 0 | 0 |
| T1 | 5.77 | 25 |
| T2 | 11.53 | 50 |
| T3 | 17.30 | 75 |
| T4 | 23.07 | 100 |