林野厅从昭和53年(1978)着手制作人工林资源预测资料。其概要如图1。全国规模地对人工林进行调查,根据林分密度有关理论进行分析,从计量上把握林分构成因素间的关系,把此制成一般能利用的人工林林分密度管理图,使此项工作图表化(林野厅),在此基础上再制作人工林产量预测表(都道府县),从而把握人工林资源量、预测收获量、研究作业体系以及决定个体林户的经营方针等,这是制作这项人工林资源预测资料的目的。 Forestry Office from 1978 (53) to make artificial forest resources forecasting data. The outline is shown in Figure 1. The survey of planted forests on a national scale, according to the theory of stand density analysis, grasp the relationship between stand factors, and make it into the plantation forest density management map can make the general use of this work (Forestry hall) on the basis of this, and then make a prediction table of plantation production (prefectures), so as to grasp the amount of plantation resources, forecast the amount of harvest, the study operating system and the decision of individual forest households management policy, etc. Is the production of plantation resources forecasting purposes.