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. 2023 Aug 24;43(5):60. doi: 10.1007/s13593-023-00914-8

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

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