| Year and species | Growth period | Actual statistical output (104 tons) | Model estimated output (104 tons) | Relative error |
| 2015 winter wheat | Late jointing | 291 | 267.98 | 7.91% |
| Filling period | 274.59 | 5.64% | ||
| 2016 winter wheat | Late jointing | 278 | 297.738 | 7.10% |
| Filling period | 291.64 | 4.91% |