Climate
- Annual precipitation (mm)
- Mean May-September precipitation (mm)
- Mean difference between July and January Temperature (°C)
- Mean annual temperature (°C)
- Mean January temperature (°C)
- Mean July temperature (°C)
- Mean May-September temperature (°C)
Elevation
- Elevation coefficient of variation
- Maximum elevation (m)
- Average elevation (m)
- Minimum elevation (m)
- Range of elevation (m)
Land-Cover
- Cropland (%)
- Forest land (%)
- Fragmentation Index (Riitters et al. 2002)
- Nonforest land (%)
- Water (%)
Soil Type
- Alfisol (%)
- Aridisol (%)
- Entisol (%)
- Histosol (%)
- Inceptisol (%)
- Mollisol (%)
- Spodosol (%)
- Ultisol (%)
- Vertisol (%)
Soil Characteristics
- Total available water capacity (cm, to 152 cm)
- Soil bulk density (g/cm3)
- Percent clay (< 0.002 mm size)
- Soil erodibility factor, rock fragment free
- Percent soil passing sieve No. 10 (coarse)
- Percent soil passing sieve No. 200 (fine)
- Organic matter content (% by weight)
- Potential soil productivity (m3 of timber/ha)
- Soil permeability rate (cm/hr)
- Soil pH
- Depth to bedrock (cm)
- Soil slope (%) of a soil component
https://www.fs.usda.gov/nrs/atlas/models/predictors.html