| Fertilizer application rate (kg/ha) | Stem weight (g) |
| 0 N | 2.14a |
| 40 N | 9.24b |
| 80 N | 13.6b |
| 120 N | 24c |
| 160 N | 31.33d |
| Grand mean | 16.08 |
| F pr | 0.001 |
| LSD | 5.926 |
| CV % | 19.6 |