Predictor Importance Values for chestnut oak (Quercus prinus)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	18.29	36
Mean May-September precipitation (mm)	29.52	5
Mean annual temperature (°C)	25.51	18
Mean May-September temperature (°C)	25.84	17
Mean temperature of coldest month (°C)	21.28	28
Mean temperature of warmest month (°C)	27.95	8
Annual aridity index	26.37	15
Minimum elevation	13.6	40
Maximum elevation	19.56	33
Average elevation	12.22	42
Median elevation	14.62	38
Range of elevation	33.64	2
Elevation coefficient ofvariation	22.73	26
Elevation standard deviation	28.93	6
Annual daylength coefficient of variation	29.79	4
Total available water capacity (cm, to 150 cm)	24.54	23
Total available water supply (cm, to 150 cm)	25.22	21
Depth to water table (cm)	27.16	12
Soil permeability rate (cm/hr)	37.46	1
Soil calcium carbonate (% by weight)	19.85	31
Soil cation-exchange capacity	27.65	9
Soil pH	21.31	27
Soil bulk density (g/cm3)	30.09	3
Organic matter content (% by weight)	25.4	20
Potential soil productivity	19.67	32
Soil erodibility factor, rock fragment free	28.62	7
Soil erosion by wind (tons/acre/year)	27.4	10
Percent soil passing sieve No. 10 (coarse)	27.09	13
Percent soil passing sieve No. 200 (fine)	26.61	14
Percent clay (< 0.002 mm size)	21.11	30
Percent sand (< 0.002 mm size)	24.95	22
Percent silt (< 0.002 mm size)	27.35	11
Percent of texture clayey	18.79	35
Percent of texture loamy	18.86	34
Percent of texture sandy	23.32	24
Percent of texture other	21.28	29
Alfisol (%)	25.41	19
Aridisol (%)	1.13	45
Entisol (%)	10.78	44
Histosol (%)	12.42	41
Inceptisol (%)	17.34	37
Mollisol (%)	23.3	25
Spodosol (%)	12.21	43
Ultisol (%)	26.07	16
Vertisol (%)	14.6	39