Predictor Importance Values for black locust (Robinia pseudoacacia)

Predictor Name	Importance Score	Rank
Annual precipitation (mm)	18.31	25
Mean May-September precipitation (mm)	20.15	19
Mean annual temperature (°C)	16.33	31
Mean May-September temperature (°C)	17.27	29
Mean temperature of coldest month (°C)	20.31	15
Mean temperature of warmest month (°C)	26.13	3
Annual aridity index	21.1	13
Minimum elevation	20.2	18
Maximum elevation	20.3	16
Average elevation	22.43	8
Median elevation	18.01	27
Range of elevation	19.02	23
Elevation coefficient ofvariation	19.73	21
Elevation standard deviation	17.15	30
Annual daylength coefficient of variation	21.37	12
Total available water capacity (cm, to 150 cm)	20.23	17
Total available water supply (cm, to 150 cm)	20.06	20
Depth to water table (cm)	30.93	1
Soil permeability rate (cm/hr)	14.88	35
Soil calcium carbonate (% by weight)	15.52	34
Soil cation-exchange capacity	22.23	10
Soil pH	22.1	11
Soil bulk density (g/cm3)	28.73	2
Organic matter content (% by weight)	18.58	24
Potential soil productivity	22.4	9
Soil erodibility factor, rock fragment free	19.58	22
Soil erosion by wind (tons/acre/year)	25.12	5
Percent soil passing sieve No. 10 (coarse)	17.91	28
Percent soil passing sieve No. 200 (fine)	22.44	7
Percent clay (< 0.002 mm size)	23.48	6
Percent sand (< 0.002 mm size)	13.67	37
Percent silt (< 0.002 mm size)	15.68	32
Percent of texture clayey	9.9	42
Percent of texture loamy	10.99	41
Percent of texture sandy	11.96	39
Percent of texture other	11.59	40
Alfisol (%)	25.56	4
Aridisol (%)	1.56	45
Entisol (%)	14.76	36
Histosol (%)	12.46	38
Inceptisol (%)	20.53	14
Mollisol (%)	18.02	26
Spodosol (%)	6.51	44
Ultisol (%)	15.67	33
Vertisol (%)	8.02	43