Predictor Importance Values for yellow-poplar (Liriodendron tulipifera)

Predictor Name Importance Score Rank
Annual precipitation (mm)23.927
Mean May-September precipitation (mm)34.228
Mean annual temperature (°C)30.6713
Mean May-September temperature (°C)29.7716
Mean temperature of coldest month (°C)29.7117
Mean temperature of warmest month (°C)35.576
Annual aridity index32.3110
Minimum elevation19.9336
Maximum elevation21.6533
Average elevation22.3830
Median elevation12.4641
Range of elevation26.4722
Elevation coefficient ofvariation37.062
Elevation standard deviation29.9514
Annual daylength coefficient of variation28.3418
Total available water capacity (cm, to 150 cm)32.1611
Total available water supply (cm, to 150 cm)25.9223
Depth to water table (cm)36.833
Soil permeability rate (cm/hr)36.295
Soil calcium carbonate (% by weight)20.3834
Soil cation-exchange capacity30.9812
Soil pH21.8632
Soil bulk density (g/cm3)33.299
Organic matter content (% by weight)24.3926
Potential soil productivity19.437
Soil erodibility factor, rock fragment free28.2419
Soil erosion by wind (tons/acre/year)37.561
Percent soil passing sieve No. 10 (coarse)29.8215
Percent soil passing sieve No. 200 (fine)35.447
Percent clay (< 0.002 mm size)25.525
Percent sand (< 0.002 mm size)27.7520
Percent silt (< 0.002 mm size)21.9531
Percent of texture clayey20.2635
Percent of texture loamy17.3638
Percent of texture sandy23.0229
Percent of texture other11.4443
Alfisol (%)27.4721
Aridisol (%)-145
Entisol (%)15.5639
Histosol (%)12.4542
Inceptisol (%)36.444
Mollisol (%)23.3328
Spodosol (%)12.5840
Ultisol (%)25.624
Vertisol (%)7.4744