Predictor Importance Values for shortleaf pine (Pinus echinata)

Predictor Name Importance Score Rank
Annual precipitation (mm)20.9625
Mean May-September precipitation (mm)26.866
Mean annual temperature (°C)21.9221
Mean May-September temperature (°C)22.9919
Mean temperature of coldest month (°C)24.6212
Mean temperature of warmest month (°C)26.018
Annual aridity index17.7833
Minimum elevation19.6628
Maximum elevation23.1916
Average elevation21.0424
Median elevation19.4429
Range of elevation23.0717
Elevation coefficient ofvariation21.7922
Elevation standard deviation18.531
Annual daylength coefficient of variation25.4710
Total available water capacity (cm, to 150 cm)27.444
Total available water supply (cm, to 150 cm)22.8220
Depth to water table (cm)36.861
Soil permeability rate (cm/hr)23.7215
Soil calcium carbonate (% by weight)16.5137
Soil cation-exchange capacity20.1526
Soil pH24.3313
Soil bulk density (g/cm3)25.3411
Organic matter content (% by weight)15.8539
Potential soil productivity17.3835
Soil erodibility factor, rock fragment free24.1714
Soil erosion by wind (tons/acre/year)19.9727
Percent soil passing sieve No. 10 (coarse)21.3423
Percent soil passing sieve No. 200 (fine)27.185
Percent clay (< 0.002 mm size)23.0118
Percent sand (< 0.002 mm size)26.47
Percent silt (< 0.002 mm size)28.893
Percent of texture clayey18.2332
Percent of texture loamy19.3730
Percent of texture sandy17.4134
Percent of texture other16.8936
Alfisol (%)16.1738
Aridisol (%)1.3945
Entisol (%)7.5944
Histosol (%)10.2842
Inceptisol (%)25.849
Mollisol (%)13.3341
Spodosol (%)8.0643
Ultisol (%)29.152
Vertisol (%)14.9240