Predictor Importance Values for bigtooth aspen (Populus grandidentata)

Predictor Name Importance Score Rank
Annual precipitation (mm)20.416
Mean May-September precipitation (mm)20.9813
Mean annual temperature (°C)19.9519
Mean May-September temperature (°C)19.2122
Mean temperature of coldest month (°C)19.7720
Mean temperature of warmest month (°C)22.128
Annual aridity index14.8438
Minimum elevation24.423
Maximum elevation20.5915
Average elevation16.0935
Median elevation17.631
Range of elevation22.129
Elevation coefficient ofvariation24.552
Elevation standard deviation24.184
Annual daylength coefficient of variation17.9129
Total available water capacity (cm, to 150 cm)1923
Total available water supply (cm, to 150 cm)17.6530
Depth to water table (cm)30.11
Soil permeability rate (cm/hr)21.410
Soil calcium carbonate (% by weight)18.6925
Soil cation-exchange capacity20.7614
Soil pH19.3421
Soil bulk density (g/cm3)23.475
Organic matter content (% by weight)14.8537
Potential soil productivity21.1212
Soil erodibility factor, rock fragment free14.9436
Soil erosion by wind (tons/acre/year)18.0828
Percent soil passing sieve No. 10 (coarse)22.337
Percent soil passing sieve No. 200 (fine)18.8524
Percent clay (< 0.002 mm size)18.427
Percent sand (< 0.002 mm size)16.3534
Percent silt (< 0.002 mm size)20.218
Percent of texture clayey14.8339
Percent of texture loamy17.4732
Percent of texture sandy21.2411
Percent of texture other7.7442
Alfisol (%)18.6326
Aridisol (%)0.5245
Entisol (%)6.2143
Histosol (%)11.9840
Inceptisol (%)20.3517
Mollisol (%)22.346
Spodosol (%)8.0941
Ultisol (%)16.533
Vertisol (%)5.5544