Multiple Regression (MR) | |||||||||
Dependent variables | Intercept & predictor variables | Parameter # | Regr. | ±SE | t-value | p-value | R2 | RMSE | n |
MCPS (%) | Intercept |
| 70.883 | 6.326 | 11.205 | <0.0001 | 0.47 | 11.69 | 394 |
Equation (2) | Elevation | 1 | −0.091 | 0.013 | −6.937 | <0.0001 |
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HW Blocks | 2 | 10.224 | 2.136 | 4.788 | <0.0001 |
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MCPS,DTW | 3 | 0.262 | 0.073 | 3.589 | 0.0003 |
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OMDSM | 4 | −0.981 | 0.278 | −3.529 | 0.0005 |
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Tracks | 5 | 4.090 | 1.233 | 3.316 | 0.001 |
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log10DTW | 6 | −2.764 | 0.926 | −2.986 | 0.003 |
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CI (MPa) | Intercept |
| 1.599 | 0.159 | 10.06 | <0.0001 | 0.41 | 0.571 | 372 |
Equation (3) | Tracks | 1 | 0.76 | 0.064 | 11.91 | <0.0001 |
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SW Blocks | 2 | 0.397 | 0.064 | 6.2 | <0.0001 |
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MCPS | 3 | −0.011 | 0.002 | −5.98 | <0.0001 |
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Depth | 4 | 0.025 | 0.002 | 9.9 | 0.0583 |
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Rut depth (cm) | Intercept |
| 18.880 | 6.592 | 2.864 | 0.0004 | 0.28 | 9.094 | 207 |
Equation (4) | log10Passes | 1 | 14.327 | 1.856 | 7.721 | <0.0001 |
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log10NCI | 2 | −22.213 | 10.625 | −2.091 | 0.038 |
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| log10DTWFIA | 3 | −2.669 | 1.071 | −2.492 | 0.014 |
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Equation (5) | a/NCIadj × PassesbNCIadj |
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| 0.32 | 9.000 | 207 |
| a |
| 40.886 | 3.275 | 12.728 | <0.0001 |
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| b |
| 0.072 | 0.007 | 9.676 | <0.0001 |
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Random Forest (RF) | |||||||||
Dependent variables | Variable | Parameter # | % Mean Decrease Accuracy | Variable Importance | R2 | RMSE | n | ||
MCPS (%) | MCPS,DTW | 1 | 191.04 | 53332.12 | 0.91 | 4.962 | 394 | ||
| Elevation | 2 | 180.54 | 32079.21 |
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| OMDSM | 3 | 38.17 | 16292.63 |
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CI (MPa) | Tracks | 1 | 0.224 | 33.20 | 0.88 | 0.263 | 372 | ||
| Depth | 2 | 0.159 | 37.43 |
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| Elevation | 3 | 0.108 | 49.27 |
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| MCPS,RF | 4 | 0.097 | 47.64 |
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| SandDSM | 5 | 0.070 | 36.86 |
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Rut depth (cm) | Passes | 1 | 71.77 | 7121.22 | 0.84 | 4.307 | 207 | ||
| NCIRF | 2 | 24.26 | 5744.51 |
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| DTWFIA | 3 | 11.35 | 5971.05 |
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| CF | 4 | 0.65 | 3813.68 |
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