Predictor Importance Values for black walnut (Juglans nigra)

Predictor Name Importance Score Rank
Annual precipitation (mm)27.553
Mean May-September precipitation (mm)27.982
Mean annual temperature (°C)27.474
Mean May-September temperature (°C)23.9512
Mean temperature of coldest month (°C)25.397
Mean temperature of warmest month (°C)29.121
Annual aridity index23.6513
Minimum elevation15.3740
Maximum elevation20.2328
Average elevation21.6822
Median elevation23.3715
Range of elevation20.9726
Elevation coefficient ofvariation12.643
Elevation standard deviation19.5232
Annual daylength coefficient of variation25.278
Total available water capacity (cm, to 150 cm)25.835
Total available water supply (cm, to 150 cm)20.2329
Depth to water table (cm)19.6231
Soil permeability rate (cm/hr)21.2825
Soil calcium carbonate (% by weight)22.219
Soil cation-exchange capacity21.9521
Soil pH22.0720
Soil bulk density (g/cm3)23.0516
Organic matter content (% by weight)24.0311
Potential soil productivity19.6230
Soil erodibility factor, rock fragment free23.5914
Soil erosion by wind (tons/acre/year)24.1110
Percent soil passing sieve No. 10 (coarse)16.6636
Percent soil passing sieve No. 200 (fine)17.4535
Percent clay (< 0.002 mm size)22.8617
Percent sand (< 0.002 mm size)24.289
Percent silt (< 0.002 mm size)20.7627
Percent of texture clayey16.0837
Percent of texture loamy21.4623
Percent of texture sandy15.639
Percent of texture other22.3918
Alfisol (%)19.2733
Aridisol (%)1.1345
Entisol (%)14.2541
Histosol (%)15.6438
Inceptisol (%)25.486
Mollisol (%)21.3224
Spodosol (%)6.8244
Ultisol (%)18.8734
Vertisol (%)12.8642