林野厅自1978年着手编制人工林资源预测资料。其概要如图1。具体讲,在全国范围内开展人工林的调查,然后根据林分密度理论进行分析,计量地掌握林分构成因子间的关系,并把图表化为一般可资利用的人工林林分密度管理图(林野厅);然后,据此编制人工林收获予测表(都道府县为单位)。编制这种人工林资源予测资料的目的是掌握人工林的资源、予测收获量、 Forestry Office since 1978, preparation of plantation resources forecasting data. The outline is shown in Figure 1. Specifically, surveys of plantations across the country are carried out. Based on the analysis of the stand density theory, the relationship between the stand components is measured and the graph is used as a graph of the plantation stand density (Forestry Department); and then prepare a planted forest harvest (metropolis and districts as a unit). The purpose of compiling this plantation resource forecasting data is to grasp the resources of planted forest, measure the yield,