Table 5.

Contribution rate and important value of environmental factors.

environmental factor	Contribution rate%	Important value%
The wettest monthly precipitation	59.1	42.5
Minimum temperature in coldest month	11.9	14.3
altitude	9	7.1
Slope variability	6.6	9.8
Maximum temperature in hottest month	4.7	9.2
Isothermal property	3	6.4
Precipitation in the driest month	2.2	5.9
Basic saturation	1.3	1.5
Soil cation exchange capacity	0.8	0.3
Carbonate or lime content	0.6	1.1
Organic carbon content	0.6	1
The wettest quarterly average temperature	0.2	0.8