山东省冠县毛白杨林场,位于鲁西平原黄河故道。为经营好现有人工林,这个场强烈要求按不同立地类型划分小班,並采取相应经营措施,充分发挥林地生产力。並相应研究抚育间伐、林粮间作、责任制等有关问题。为此,委托林业部调查规划设计院进行以上有关技术研 Mao County, Shandong Province Poplar Forest Farm, located in the old course of the Yellow River in western Shandong. In order to manage the existing plantation well, this field strongly demanded that small classes should be divided according to different types of sites and corresponding management measures should be taken to give full play to their productivity. And the corresponding research tending thinning, intercropping forest, responsibility and other issues. To this end, commissioned the Ministry of Forestry Survey Planning and Design Institute to carry out the above technical research