Predictor Importance Values for swamp white oak (Quercus bicolor)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	14.76	11
Mean May-September precipitation (mm)	14.08	15
Mean annual temperature (°C)	11.59	29
Mean May-September temperature (°C)	14.07	16
Mean temperature of coldest month (°C)	20.07	1
Mean temperature of warmest month (°C)	17.56	4
Annual aridity index	17.6	3
Minimum elevation	10.44	32
Maximum elevation	12.82	25
Average elevation	8.96	39
Median elevation	9.77	36
Range of elevation	6.2	43
Elevation coefficient ofvariation	13.12	22
Elevation standard deviation	13.01	23
Annual daylength coefficient of variation	18.48	2
Total available water capacity (cm, to 150 cm)	14.33	14
Total available water supply (cm, to 150 cm)	14.76	10
Depth to water table (cm)	14.03	17
Soil permeability rate (cm/hr)	13.34	20
Soil calcium carbonate (% by weight)	12.85	24
Soil cation-exchange capacity	15.43	7
Soil pH	15.35	8
Soil bulk density (g/cm3)	13.28	21
Organic matter content (% by weight)	17.34	5
Potential soil productivity	15.94	6
Soil erodibility factor, rock fragment free	11.67	28
Soil erosion by wind (tons/acre/year)	14.53	13
Percent soil passing sieve No. 10 (coarse)	10.05	34
Percent soil passing sieve No. 200 (fine)	11.28	30
Percent clay (< 0.002 mm size)	12.42	27
Percent sand (< 0.002 mm size)	13.5	18
Percent silt (< 0.002 mm size)	13.45	19
Percent of texture clayey	7.41	42
Percent of texture loamy	9.01	38
Percent of texture sandy	12.8	26
Percent of texture other	9.98	35
Alfisol (%)	14.56	12
Aridisol (%)	0	44
Entisol (%)	8.6	40
Histosol (%)	11.18	31
Inceptisol (%)	14.81	9
Mollisol (%)	10.26	33
Spodosol (%)	8.29	41
Ultisol (%)	9.14	37
Vertisol (%)	-0.32	45