Predictor Importance Values for eastern cottonwood (Populus deltoides)

Predictor Name Importance Score Rank
Annual precipitation (mm)13.3934
Mean May-September precipitation (mm)21.476
Mean annual temperature (°C)18.9614
Mean May-September temperature (°C)18.121
Mean temperature of coldest month (°C)19.5211
Mean temperature of warmest month (°C)14.9129
Annual aridity index21.75
Minimum elevation17.5225
Maximum elevation12.9137
Average elevation18.8716
Median elevation18.2919
Range of elevation18.6718
Elevation coefficient ofvariation20.177
Elevation standard deviation24.382
Annual daylength coefficient of variation19.7410
Total available water capacity (cm, to 150 cm)15.927
Total available water supply (cm, to 150 cm)17.8223
Depth to water table (cm)24.083
Soil permeability rate (cm/hr)24.941
Soil calcium carbonate (% by weight)14.8830
Soil cation-exchange capacity14.2532
Soil pH19.3112
Soil bulk density (g/cm3)23.334
Organic matter content (% by weight)20.168
Potential soil productivity1913
Soil erodibility factor, rock fragment free17.9422
Soil erosion by wind (tons/acre/year)18.8715
Percent soil passing sieve No. 10 (coarse)18.1720
Percent soil passing sieve No. 200 (fine)10.7740
Percent clay (< 0.002 mm size)17.5724
Percent sand (< 0.002 mm size)10.2342
Percent silt (< 0.002 mm size)13.8233
Percent of texture clayey18.6717
Percent of texture loamy13.1835
Percent of texture sandy15.5728
Percent of texture other12.639
Alfisol (%)14.6331
Aridisol (%)1.1945
Entisol (%)10.4241
Histosol (%)1336
Inceptisol (%)19.849
Mollisol (%)17.226
Spodosol (%)8.8643
Ultisol (%)12.7138
Vertisol (%)8.2444