9SON Y. Nitrogen and phosphorous distribution for five planta- tion species in southwestern Wisconsin[J]. Forest Ecology and Management,1992,53(1) :67- 75.
10GILLMAN G P, SINCLAIR D F, KNOWLTON R, et al. The effect on some soil chemical properties of the selective logging of a north Queensland rainforest[J]. Forest Ecology and Man- agement,1985,12:195 -214.
