| Yield group | Mean | farmers | Std. Dev. | Min | Max | Yield gap |
| y1 | 2.4 | 78 | 0.6 | 0.6 | 3.5 | 3.4 |
| y2 | 4.1 | 79 | 0.3 | 3.6 | 4.7 | 1.7 |
| y3 | 5.8 | 79 | 1.0 | 4.8 | 9.0 | -- |