(in decreasing order of importance)
| Predictor Name | Importance Score | Rank |
|---|---|---|
| Ultisol (%) | 24.17 | 1 |
| Mean January temperature (°C) | 22.9 | 2 |
| Cropland (%) | 19.94 | 3 |
| Mean May-September temperature (°C) | 19.28 | 4 |
| Mean July temperature (°C) | 18.71 | 5 |
| Soil slope (%) of a soil component | 18.66 | 6 |
| Depth to bedrock (cm) | 17.78 | 7 |
| Percent soil passing sieve No. 10 (coarse) | 17.46 | 8 |
| Soil permeability rate (cm/hr) | 17.17 | 9 |
| Percent clay (< 0.002 mm size) | 17.11 | 10 |
| Soil pH | 16.16 | 11 |
| Mean annual temperature (°C) | 15.78 | 12 |
| Mean difference between July and January Temperature (°C) | 15.75 | 13 |
| Forest land (%) | 15.56 | 14 |
| Elevation coefficient of variation | 14.31 | 15 |
| Annual precipitation (mm) | 13.09 | 16 |
| Organic matter content (% by weight) | 12.7 | 17 |
| Range of elevation (m) | 12.6 | 18 |
| Nonforest land (%) | 12.1 | 19 |
| Mean May-September precipitation (mm) | 11.85 | 20 |
| Inceptisol (%) | 11.55 | 21 |
| Alfisol (%) | 11.52 | 22 |
| Maximum elevation (m) | 11.5 | 23 |
| Histosol (%) | 11.47 | 24 |
| Mollisol (%) | 11.24 | 25 |
| Vertisol (%) | 11.05 | 26 |
| Entisol (%) | 10.95 | 27 |
| Potential soil productivity (m3 of timber/ha) | 10.86 | 28 |
| Total available water capacity (cm, to 152 cm) | 10.55 | 29 |
| Percent soil passing sieve No. 200 (fine) | 9.54 | 30 |
| Soil erodibility factor, rock fragment free | 8.6 | 31 |
| Fragmentation Index (Riitters et al. 2002) | 8.24 | 32 |
| Spodosol (%) | 6.59 | 33 |
| Minimum elevation (m) | 5.81 | 34 |
| Soil bulk density (g/cm3) | 5.78 | 35 |
| Water (%) | 4.29 | 36 |
| Average elevation (m) | 3.63 | 37 |
| Aridisol (%) | 0 | 38 |