5Natural Resources Conservation Service. Conservation Practice Standard: Forest Stand Improvement (Acre) [ M ]. USA: U. S. Congress, 2000.
6Forest Service, United States Department of Agriculture. Forest- Wide, Multi-year TSI ( Timber Stand Improvement) Project ( Decision Memo) [ M]. USA. :TSI Project, 2008.
7Ministry of Agriculture and Forestry. Finland's National Forest Programme2010 ( Follow-up report 2005--2006 ) [ M ]. Finland: Ministry of Agriculture and Forestry Publications, 2007.
8Bates J D,Svejcar T S,Miller R F. 2007. Litter decomposition in cut and uncut western juniper woodlands. Journal and Arid Environments, 70(2) : 222 -236.
9Brokaw N V L. 1987. Gap phase regeneration of three pioneer tree in a tropical forest. J Ecology,75 ( 1 ) : 9 - 19.
10Gundale M J, Deluca T H, Fiedler C E, et al. 2005. Restoration treatments in a Montana Ponderosa pine forest effects on soil physical, chemical and biological properties. Forest Ecology and Management,213 ( 1/3 ) : 25 - 38.
