Predictor Importance Values for hackberry (Celtis occidentalis)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	27.22	2
Mean May-September precipitation (mm)	24.56	9
Mean annual temperature (°C)	25.14	7
Mean May-September temperature (°C)	22.31	19
Mean temperature of coldest month (°C)	21.68	22
Mean temperature of warmest month (°C)	21.96	21
Annual aridity index	23.68	13
Minimum elevation	12.49	40
Maximum elevation	23.13	16
Average elevation	23.55	14
Median elevation	22.99	17
Range of elevation	20.75	24
Elevation coefficient ofvariation	25.78	4
Elevation standard deviation	27	3
Annual daylength coefficient of variation	25.29	6
Total available water capacity (cm, to 150 cm)	17.16	32
Total available water supply (cm, to 150 cm)	17.11	33
Depth to water table (cm)	24.46	11
Soil permeability rate (cm/hr)	18.49	27
Soil calcium carbonate (% by weight)	17.04	34
Soil cation-exchange capacity	15.69	36
Soil pH	24.74	8
Soil bulk density (g/cm3)	24.08	12
Organic matter content (% by weight)	22.74	18
Potential soil productivity	20.24	25
Soil erodibility factor, rock fragment free	19	26
Soil erosion by wind (tons/acre/year)	27.55	1
Percent soil passing sieve No. 10 (coarse)	25.62	5
Percent soil passing sieve No. 200 (fine)	18.09	28
Percent clay (< 0.002 mm size)	20.85	23
Percent sand (< 0.002 mm size)	22.25	20
Percent silt (< 0.002 mm size)	17.9	29
Percent of texture clayey	11.52	41
Percent of texture loamy	15.72	35
Percent of texture sandy	15.01	37
Percent of texture other	17.18	31
Alfisol (%)	17.2	30
Aridisol (%)	2.68	45
Entisol (%)	5.56	44
Histosol (%)	13.25	38
Inceptisol (%)	24.52	10
Mollisol (%)	23.14	15
Spodosol (%)	5.66	43
Ultisol (%)	13.14	39
Vertisol (%)	10.92	42