本刊一九七四年第四期转载了《土面增温剂简介》,发表了嫩江格球山农场《土面增温剂在落叶松云杉全光育苗上的应用》.一九七五年土面增温剂在林业上的应用试验又有了新发展,取得了显著效果.本期再发一组有关土面增温剂在林业上应用的文章,供各地在试验应用中参考. The fourth issue in 1974 reprinted the “Brief Introduction to soil warming agent,” published a Nengang Qiuqiu Shan farm “soil surface warming agent in larch seedling nursery seedlings on the application.” One seven seven Five years of soil surface warming agent in the forestry of the application of the test has been a new development and achieved remarkable results. This issue of a group of reusable soil surface temperature agent in forestry applications article for reference throughout the test application .