Predictor Importance Values for northern red oak (Quercus rubra)

Predictor Name Importance Score Rank
Annual precipitation (mm)36.316
Mean May-September precipitation (mm)38.722
Mean annual temperature (°C)34.219
Mean May-September temperature (°C)36.287
Mean temperature of coldest month (°C)31.0617
Mean temperature of warmest month (°C)37.494
Annual aridity index31.9614
Minimum elevation24.6135
Maximum elevation24.7334
Average elevation22.0837
Median elevation25.5132
Range of elevation34.318
Elevation coefficient ofvariation32.9412
Elevation standard deviation38.043
Annual daylength coefficient of variation28.5124
Total available water capacity (cm, to 150 cm)29.8723
Total available water supply (cm, to 150 cm)25.7430
Depth to water table (cm)42.31
Soil permeability rate (cm/hr)30.0522
Soil calcium carbonate (% by weight)27.8725
Soil cation-exchange capacity3118
Soil pH25.929
Soil bulk density (g/cm3)33.4711
Organic matter content (% by weight)30.6820
Potential soil productivity27.3127
Soil erodibility factor, rock fragment free25.0933
Soil erosion by wind (tons/acre/year)34.1910
Percent soil passing sieve No. 10 (coarse)30.221
Percent soil passing sieve No. 200 (fine)31.1616
Percent clay (< 0.002 mm size)27.4526
Percent sand (< 0.002 mm size)25.6531
Percent silt (< 0.002 mm size)30.8619
Percent of texture clayey19.1340
Percent of texture loamy26.8328
Percent of texture sandy31.6315
Percent of texture other21.9538
Alfisol (%)32.8413
Aridisol (%)-1.2445
Entisol (%)12.9143
Histosol (%)18.541
Inceptisol (%)37.45
Mollisol (%)22.1836
Spodosol (%)16.2542
Ultisol (%)19.8239
Vertisol (%)11.8844