(一) 森林资源是林业生产建设的基础,是森林经营工作的中心。及时、准确地掌握森林资源的数量、质量、分布及动态趋势,是制定和贯彻国家林业方针、政策、法令及编制林业区划、规划和生产计划的主要依据,也是合理组织经营森林的主要依据。林业发达国家,都把清查森林资源摆在各项林业工作的第一位。截至七十年代末、八十年代初,全国性的森林资源清查,苏联已作过10次, (I) Forest resources are the foundation of forestry production and construction and the center of forest management. Timely and accurate grasp of the quantity, quality, distribution and dynamic trends of forest resources are the main basis for formulating and implementing the national forestry policies, decrees and plans for the preparation, planning and production of forestry. They are also the main basis for the rational organization and management of forests. The forestry developed countries put the inventory of forest resources in the first place in all forestry work. As of the late seventies and early eighties, the national forest resources inventory, the Soviet Union has made 10 times,