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一九八一年九月至一九八二年一月,我受林业部和规划局领导的委派,作为访问学者赴美国爱达荷大学林学院进修林业遥感技术,并对美国当前森林资源工作的情况作简要的考察。现综合汇报如下:一、美国森林调查概况及其主要经验美国近百年来林业的发展大体上经历了四个时期。即:
From September 1981 to January 1982, I was appointed by the Ministry of Forestry and the Planning Bureau as a visiting scholar to study forestry remote sensing technology at the University of Idaho College of Forestry, and to work on current forest resources in the United States A brief survey of the situation. The comprehensive report is as follows: I. Overview of Forest Investigation in the United States and Its Main Experiences The development of forestry in the United States has generally gone through four periods in the recent century. which is: