Table 5 Mixed linear models predicting rut depth (cm). The parameters are as follows:
From: Predicting rut depth induced by an 8-wheeled forwarder in fine-grained boreal forest soils
Model parameter | 1 | 2 | 3 | 4 | ||||
|---|---|---|---|---|---|---|---|---|
Estimate (SE) | Sig. | Estimate (SE) | Sig. | Estimate (SE) | Sig. | Estimate (SE) | Sig. | |
Fixed | ||||||||
Intercept | − 35.3 (3.43) | .000 | − 39.9 (2.30) | .000 | − 32.4 (2.59) | .000 | − 37.3 (2.41) | .000 |
Ln Mass, kg | 3.86 (0.183) | .000 | 3.86 (0.183) | .000 | 3.86 (0.183) | .000 | 3.86 (0.183) | .000 |
VWC3, % | 0.0000917 (0.0000166) | .001 | 0.0000431 (0.0000145) | .005 | ||||
PR020 | − 1.02 (0.536) | .059 | − 0.978 (0.525) | .064 | ||||
BD, g/cm3 | − 5.76 (3.16) | .075 | .000 | |||||
Humus layer, cm | 1.11 (0.172) | .000 | 0.681 (0.169) | .001 | 0.883 (0.166) | .000 | ||
Random | ||||||||
ui | 0.909 | .535 | 0.795 | .538 | 10.1 | .211 | 1.24 | .472 |
vij | 6.54 | .000 | 6.99 | .000 | 10.2 | .000 | 7.84 | .000 |
\( {\upsigma}_{\mathrm{meas}}^2 \) | 16.3 | .000 | 16.3 | .000 | 16.3 | .000 | 16.3 | .000 |
ρmeas | 0.707 | .000 | 0.707 | .000 | 0.707 | .000 | 0.707 | .000 |
AIC | 6220.7 | 6228.1 | 6227.7 | 6211.8 | ||||