To measure the physical and chemical properties of soil and understand soil characteristics of different forest stand types in the Wulashan Natural Reserve,7 sample plots of Betula platyphylla Suk.,Amygdalus mongolica( Maxim.) Ricker,Pinus tabulaeformis Carr. and grass land were set,and soil sampling from soil layers of 0 ~10 cm,10 ~ 20 cm,20 ~ 40 cm,and 40 ~ 60 cm were collected by taking 7 forest stand types as research objects.The results shows that there were obvious layering characteristics in the soil...