Predictor Importance Values for shingle oak (Quercus imbricaria)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	15.28	7
Mean May-September precipitation (mm)	17.46	2
Mean annual temperature (°C)	12.3	19
Mean May-September temperature (°C)	12.86	15
Mean temperature of coldest month (°C)	17.87	1
Mean temperature of warmest month (°C)	14.01	10
Annual aridity index	15.9	5
Minimum elevation	14.25	9
Maximum elevation	11.31	23
Average elevation	14.35	8
Median elevation	12.78	16
Range of elevation	11.53	21
Elevation coefficient ofvariation	12.67	17
Elevation standard deviation	16.38	3
Annual daylength coefficient of variation	15.65	6
Total available water capacity (cm, to 150 cm)	13.79	12
Total available water supply (cm, to 150 cm)	10.48	28
Depth to water table (cm)	10.38	29
Soil permeability rate (cm/hr)	11.42	22
Soil calcium carbonate (% by weight)	13.8	11
Soil cation-exchange capacity	9.53	33
Soil pH	15.93	4
Soil bulk density (g/cm3)	9.34	34
Organic matter content (% by weight)	9.61	32
Potential soil productivity	13.15	13
Soil erodibility factor, rock fragment free	12.63	18
Soil erosion by wind (tons/acre/year)	7.84	36
Percent soil passing sieve No. 10 (coarse)	11.11	24
Percent soil passing sieve No. 200 (fine)	10.29	30
Percent clay (< 0.002 mm size)	12.17	20
Percent sand (< 0.002 mm size)	8.47	35
Percent silt (< 0.002 mm size)	13	14
Percent of texture clayey	10.75	25
Percent of texture loamy	6.37	40
Percent of texture sandy	7.02	38
Percent of texture other	6.06	41
Alfisol (%)	10.61	26
Aridisol (%)	-0.99	45
Entisol (%)	3.53	42
Histosol (%)	7.26	37
Inceptisol (%)	9.82	31
Mollisol (%)	10.54	27
Spodosol (%)	0.56	44
Ultisol (%)	6.7	39
Vertisol (%)	2.36	43