Predictor Importance Values for boxelder (Acer negundo)

Predictor Name Importance Score Rank
Annual precipitation (mm)18.8333
Mean May-September precipitation (mm)22.4223
Mean annual temperature (°C)20.4930
Mean May-September temperature (°C)26.673
Mean temperature of coldest month (°C)21.7126
Mean temperature of warmest month (°C)24.778
Annual aridity index27.452
Minimum elevation24.629
Maximum elevation24.5411
Average elevation24.5510
Median elevation20.8628
Range of elevation23.4917
Elevation coefficient ofvariation20.2631
Elevation standard deviation20.9227
Annual daylength coefficient of variation24.4712
Total available water capacity (cm, to 150 cm)12.3942
Total available water supply (cm, to 150 cm)7.6744
Depth to water table (cm)23.2719
Soil permeability rate (cm/hr)29.351
Soil calcium carbonate (% by weight)18.6634
Soil cation-exchange capacity16.9535
Soil pH25.136
Soil bulk density (g/cm3)22.0125
Organic matter content (% by weight)22.1424
Potential soil productivity24.0113
Soil erodibility factor, rock fragment free25.415
Soil erosion by wind (tons/acre/year)23.5316
Percent soil passing sieve No. 10 (coarse)24.0114
Percent soil passing sieve No. 200 (fine)23.3518
Percent clay (< 0.002 mm size)25.914
Percent sand (< 0.002 mm size)23.2520
Percent silt (< 0.002 mm size)20.1332
Percent of texture clayey15.3138
Percent of texture loamy20.829
Percent of texture sandy16.136
Percent of texture other23.6415
Alfisol (%)25.027
Aridisol (%)145
Entisol (%)13.2439
Histosol (%)13.2240
Inceptisol (%)22.8521
Mollisol (%)22.6222
Spodosol (%)12.6141
Ultisol (%)15.4237
Vertisol (%)8.3443