Predictor Importance Values for sugar maple (Acer saccharum)

Predictor Name Importance Score Rank
Annual precipitation (mm)36.088
Mean May-September precipitation (mm)39.382
Mean annual temperature (°C)30.6323
Mean May-September temperature (°C)28.330
Mean temperature of coldest month (°C)32.9316
Mean temperature of warmest month (°C)28.3429
Annual aridity index27.5533
Minimum elevation30.7422
Maximum elevation27.9431
Average elevation29.6927
Median elevation22.7338
Range of elevation28.4928
Elevation coefficient ofvariation27.6432
Elevation standard deviation32.4718
Annual daylength coefficient of variation31.5221
Total available water capacity (cm, to 150 cm)34.711
Total available water supply (cm, to 150 cm)33.9413
Depth to water table (cm)36.157
Soil permeability rate (cm/hr)38.763
Soil calcium carbonate (% by weight)41.271
Soil cation-exchange capacity38.534
Soil pH29.9826
Soil bulk density (g/cm3)37.756
Organic matter content (% by weight)30.0825
Potential soil productivity34.8310
Soil erodibility factor, rock fragment free36.019
Soil erosion by wind (tons/acre/year)33.6115
Percent soil passing sieve No. 10 (coarse)26.5834
Percent soil passing sieve No. 200 (fine)32.8317
Percent clay (< 0.002 mm size)32.1520
Percent sand (< 0.002 mm size)25.1535
Percent silt (< 0.002 mm size)38.015
Percent of texture clayey22.240
Percent of texture loamy32.4219
Percent of texture sandy30.3224
Percent of texture other24.1436
Alfisol (%)33.7714
Aridisol (%)1.8945
Entisol (%)13.1843
Histosol (%)17.3842
Inceptisol (%)34.4912
Mollisol (%)23.237
Spodosol (%)21.9641
Ultisol (%)22.4739
Vertisol (%)9.0644