Predictor Importance Values for pond pine (Pinus serotina)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	10.84	17
Mean May-September precipitation (mm)	10.2	20
Mean annual temperature (°C)	11.25	15
Mean May-September temperature (°C)	11.26	14
Mean temperature of coldest month (°C)	11.81	13
Mean temperature of warmest month (°C)	12.75	9
Annual aridity index	17.17	1
Minimum elevation	8.6	31
Maximum elevation	15.37	2
Average elevation	9.23	26
Median elevation	9.02	29
Range of elevation	9.32	24
Elevation coefficient ofvariation	13.45	6
Elevation standard deviation	10.82	18
Annual daylength coefficient of variation	14.82	3
Total available water capacity (cm, to 150 cm)	9.27	25
Total available water supply (cm, to 150 cm)	13.74	4
Depth to water table (cm)	3.31	43
Soil permeability rate (cm/hr)	9.48	22
Soil calcium carbonate (% by weight)	12.93	8
Soil cation-exchange capacity	8.18	34
Soil pH	12.25	11
Soil bulk density (g/cm3)	7.94	35
Organic matter content (% by weight)	8.47	33
Potential soil productivity	13.46	5
Soil erodibility factor, rock fragment free	9.12	27
Soil erosion by wind (tons/acre/year)	9.06	28
Percent soil passing sieve No. 10 (coarse)	12.48	10
Percent soil passing sieve No. 200 (fine)	6.28	41
Percent clay (< 0.002 mm size)	10.82	19
Percent sand (< 0.002 mm size)	8.73	30
Percent silt (< 0.002 mm size)	7.72	37
Percent of texture clayey	4.04	42
Percent of texture loamy	6.31	40
Percent of texture sandy	7.93	36
Percent of texture other	9.43	23
Alfisol (%)	12.04	12
Aridisol (%)	-1	45
Entisol (%)	0.59	44
Histosol (%)	6.6	39
Inceptisol (%)	9.86	21
Mollisol (%)	8.59	32
Spodosol (%)	11.24	16
Ultisol (%)	13.45	7
Vertisol (%)	7.56	38