Predictor Importance Values for shagbark hickory (Carya ovata)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	31.9	2
Mean May-September precipitation (mm)	33.01	1
Mean annual temperature (°C)	23.04	14
Mean May-September temperature (°C)	21.84	21
Mean temperature of coldest month (°C)	24.11	12
Mean temperature of warmest month (°C)	25.97	11
Annual aridity index	27.15	8
Minimum elevation	18.59	28
Maximum elevation	16.01	34
Average elevation	21.33	22
Median elevation	22.48	17
Range of elevation	13.43	37
Elevation coefficient ofvariation	26.82	9
Elevation standard deviation	21.21	23
Annual daylength coefficient of variation	22.03	19
Total available water capacity (cm, to 150 cm)	28.99	4
Total available water supply (cm, to 150 cm)	21.98	20
Depth to water table (cm)	27.71	7
Soil permeability rate (cm/hr)	23.81	13
Soil calcium carbonate (% by weight)	13.04	38
Soil cation-exchange capacity	20.95	25
Soil pH	28.75	5
Soil bulk density (g/cm3)	17.35	32
Organic matter content (% by weight)	17.69	31
Potential soil productivity	12.47	39
Soil erodibility factor, rock fragment free	18.64	27
Soil erosion by wind (tons/acre/year)	28.73	6
Percent soil passing sieve No. 10 (coarse)	26.54	10
Percent soil passing sieve No. 200 (fine)	20.62	26
Percent clay (< 0.002 mm size)	23	15
Percent sand (< 0.002 mm size)	21.17	24
Percent silt (< 0.002 mm size)	22.39	18
Percent of texture clayey	13.47	36
Percent of texture loamy	16.98	33
Percent of texture sandy	22.69	16
Percent of texture other	8.92	44
Alfisol (%)	30.22	3
Aridisol (%)	0	45
Entisol (%)	11.75	41
Histosol (%)	9.42	43
Inceptisol (%)	18.02	29
Mollisol (%)	18	30
Spodosol (%)	9.83	42
Ultisol (%)	15.71	35
Vertisol (%)	12.14	40