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为了进一步合理规划设计华北地区的农田防护林,我们在河北、河南、山东及江苏等省的防护林地区进行了调查研究。根据调查材料以及工作中的体会,对华北地区营造农田防护林的几个主要技术问题,提出以下一些意见和同志们商榷。
In order to further rationally plan and design farmland shelterbelts in North China, we conducted a survey and study in shelter belt areas in Hebei, Henan, Shandong and Jiangsu provinces. According to the survey materials and work experience, to several major technical problems of farmland shelterbelt in North China, put forward the following opinions and comrades to discuss.