Preliminary Study on Treatment of Stand Tending Slashes in Landscape Forest of Xishan Forest Farm;

During November 2007 to October 2008,positive and negative air ions concentration were measured in the West Lake forest and urban district in Hangzhou and analyzed by the related methods.

The paper defined the northwest forestry as the ecological forest,on the basis of analysis of the northwest forestry development.

According to scientific, reasonable and practical principle and combining internal and external envirnomental factors of forestry key construction projects,this article classifies strategic planning targets of Shaanxi forestry into 15 items and distinguishes four ranks:important,sub important,common and non requisite.