| NP doses (kg∙ha−1) | Varieties | Mean | |
| S-17 | Pr-125 | ||
| No fertilizer (Control) | 28.00 | 23.00 | 25.50 d |
| NP @ 30 - 30 | 50.00 | 48.00 | 49.00 c |
| NP @ 50 - 30 | 53.00 | 50.00 | 51.50 c |
| NP @ 50 - 50 | 55.00 | 51.00 | 53.00 bc |
| NP @ 70 - 50 | 58.00 | 55.00 | 56.50 ab |
| NP @ 70 - 70 | 59.33 | 56.00 | 57.67 a |
| Mean | 50.56 a | 47.17 b | - |