Predictor Importance Values for pignut hickory (Carya glabra)

Predictor Name Importance Score Rank
Annual precipitation (mm)22.2329
Mean May-September precipitation (mm)25.9510
Mean annual temperature (°C)22.4726
Mean May-September temperature (°C)25.2717
Mean temperature of coldest month (°C)31.564
Mean temperature of warmest month (°C)25.2218
Annual aridity index24.0623
Minimum elevation20.2234
Maximum elevation22.3528
Average elevation21.6131
Median elevation24.7521
Range of elevation19.4636
Elevation coefficient ofvariation20.3433
Elevation standard deviation25.4415
Annual daylength coefficient of variation26.69
Total available water capacity (cm, to 150 cm)25.4714
Total available water supply (cm, to 150 cm)25.1619
Depth to water table (cm)19.2138
Soil permeability rate (cm/hr)35.911
Soil calcium carbonate (% by weight)19.0839
Soil cation-exchange capacity34.152
Soil pH21.2932
Soil bulk density (g/cm3)31.63
Organic matter content (% by weight)22.4327
Potential soil productivity24.5622
Soil erodibility factor, rock fragment free19.4137
Soil erosion by wind (tons/acre/year)25.7711
Percent soil passing sieve No. 10 (coarse)25.4416
Percent soil passing sieve No. 200 (fine)25.513
Percent clay (< 0.002 mm size)30.235
Percent sand (< 0.002 mm size)21.8430
Percent silt (< 0.002 mm size)29.776
Percent of texture clayey25.0820
Percent of texture loamy23.5824
Percent of texture sandy20.1635
Percent of texture other25.5812
Alfisol (%)29.158
Aridisol (%)0.3645
Entisol (%)12.3843
Histosol (%)15.0141
Inceptisol (%)29.387
Mollisol (%)22.7525
Spodosol (%)12.3744
Ultisol (%)17.3440
Vertisol (%)13.7642