农业是国民经济的基础,林业是农业的重要组成部分,尤其是在森林覆被率低,生态环境恶化,人口密集,旱、涝、风、沙、碱等自然灾害频繁的黄、淮、海平原地区发展农业,必须抓好林业,更有它的重要意义。现在着重根据山东情况谈几点看法:一、历史的教训值得注意黄、淮、海地区自然灾害频繁,是人所共知的。它是先天性的(地理位置)?还是后起的(人为的)?从历史的发展来看,几方面的因素皆具,互相作用。但前者是无法改变的,而后者是可变的。实际上从有人类历史以来都在不断改变着。自上古时代,在 Agriculture is the foundation of the national economy. Forestry is an important part of agriculture. Especially in areas with low forest cover, deteriorating ecological environment, dense population, frequent natural disasters like drought, flood, wind, sand and alkali, the Yellow River, the Huai River and the sea In the development of agriculture in the plains, we must do a good job in forestry and have its important significance. Now I will focus on the situation in Shandong on a few points: First, the lessons of history It is noteworthy that frequent natural disasters in the Yellow, Huai and Hai regions are well known. Is it congenital (geographically) or post-mortem (human)? Historically, there are several elements that interact with each other. But the former can not be changed, while the latter is changeable. In fact, human history has been constantly changing. Since ancient times,