Predictor Importance Values for slash pine (Pinus elliottii)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	25.56	5
Mean May-September precipitation (mm)	20.85	18
Mean annual temperature (°C)	23.43	10
Mean May-September temperature (°C)	15.8	32
Mean temperature of coldest month (°C)	24.92	7
Mean temperature of warmest month (°C)	15.1	34
Annual aridity index	13.45	37
Minimum elevation	13.44	38
Maximum elevation	11.99	39
Average elevation	18.59	24
Median elevation	17.23	28
Range of elevation	18.04	27
Elevation coefficient ofvariation	21.45	17
Elevation standard deviation	20.43	19
Annual daylength coefficient of variation	24.34	8
Total available water capacity (cm, to 150 cm)	18.75	23
Total available water supply (cm, to 150 cm)	22.06	16
Depth to water table (cm)	33.66	2
Soil permeability rate (cm/hr)	19.89	21
Soil calcium carbonate (% by weight)	15.29	33
Soil cation-exchange capacity	24.23	9
Soil pH	33.89	1
Soil bulk density (g/cm3)	18.32	25
Organic matter content (% by weight)	22.32	15
Potential soil productivity	25.43	6
Soil erodibility factor, rock fragment free	26.19	3
Soil erosion by wind (tons/acre/year)	15.94	31
Percent soil passing sieve No. 10 (coarse)	23.06	12
Percent soil passing sieve No. 200 (fine)	19.74	22
Percent clay (< 0.002 mm size)	16.42	30
Percent sand (< 0.002 mm size)	18.32	26
Percent silt (< 0.002 mm size)	22.82	14
Percent of texture clayey	8.83	41
Percent of texture loamy	8.58	42
Percent of texture sandy	6.18	43
Percent of texture other	13.73	36
Alfisol (%)	22.93	13
Aridisol (%)	0	45
Entisol (%)	5.11	44
Histosol (%)	14.18	35
Inceptisol (%)	20.14	20
Mollisol (%)	16.51	29
Spodosol (%)	25.93	4
Ultisol (%)	23.26	11
Vertisol (%)	9.64	40