Table 3.
Summary table for the global analysis on all yield data (n = 316) of the three crops (wheat, barley and beans) across the two sites during 2020–2021 using a linear mixed model.
| df | p value | |
|---|---|---|
| Cultivation | 1 | 0.199 |
| Protection | 1 | 0.199 |
| Nutrition | 1 | 0.506 |
| Site | 1 | 0.662 |
| Cr.Rt | 6 | <0.001 |
| Cultivation×Protection | 1 | 0.514 |
| Cultivation×Nutrition | 1 | 0.233 |
| Cultivation×Site | 1 | 0.885 |
| Protection×Nutrition | 1 | 0.930 |
| Protection×Site | 1 | 0.354 |
| Nutrition×Site | 1 | 0.859 |
| Cultivation×Cr.Rt | 6 | 0.761 |
| Protection×Cr.Rt | 6 | 0.705 |
| Nutrition×Cr.Rt | 6 | 0.948 |
| Site×Cr.Rt | 6 | 0.703 |
| Cultivation×Protection×Nutrition | 1 | 0.393 |
| Cultivation×Protection×Site | 1 | 0.187 |
| Cultivation×Nutrition×Site | 1 | 0.339 |
| Protection×Nutrition×Site | 1 | 0.619 |
| Cultivation×Protection×Cr.Rt | 6 | 0.811 |
| Cultivation×Nutrition×Cr.Rt | 6 | 0.964 |
| Cultivation×Site×Cr.Rt | 6 | 0.021 |
| Protection×Nutrition×Cr.Rt | 6 | 0.975 |
| Protection×Site×Cr.Rt | 6 | 0.873 |
| Nutrition×Site×Cr.Rt | 6 | 0.994 |
| Cultivation×Protection×Nutrition×Site | 1 | 0.378 |
As crop and rotation were partially crossed (i.e., not all combinations present), a new variable, Cr.Rt, was created to represent combinations of the two factors in the model. The random effect was specified as a nested structure, random = ~1 | Site/Mainplot/Subplot/Year. p values were derived from Wald Chi-square tests
Significant effects (p<0.05) are indicated in bold