Economic Evaluation of Area-based Forest Plans : A case study for the Tokyo University Forest in Chiba Prefecture

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概要

• 論文の詳細を見る

• This paper reports on the economic evaluation of simulated harvests resulting from various forest management plans. First, a series of procedures for the economic evaluation of forest management on the basis of sustainable forest plans were developed. The plans evaluated consist of a long-term plan, in which approximately equal areas would be cut during each working period, and medium-term plan, in which approximately equal amounts of labour would be involved each year. Costs, gross income, and net income of forest management are evaluated according to these plans. Next, Compartments 25 to 28 in the Tokyo University Forest in Chiba Prefecture were used as study areas, and they were assumed to be a working unit. The forest plans were made by using a geographic information system for sugi (Cryptomeria japonica) and hinoki (Chamaecyparis obtusa) plantations with 60-, 70- and 80-year rotations. Costs, gross income and net income for the plans were evaluated under nine sets of conditions of cost and timber price. Under the present conditions, net incomes per hectare were 1,176 thousand yen for the 60- and 70-year rotations and 852 thousand yen for the 80-year rotation. The investment in the study site was profitable even under the worst set of conditions, even though the internal rate of return for a coniferous plantation is low. Therefore, if Japanese foresters have sufficient growing stock and forest roads, they can derive high profits from forest management.

• 森林計画学会の論文

著者

• Zheng Yuejun

  Faculty Of Culture And Information Science Doshisha University

• Tatsuhara Satoshi

  Faculty Of Agriculture Niigata University

• Takahashi Tomoko

  Faculty Of Agriculture The University Of Tokyo:(present Office)mitsui-shin Information System Co. Lt

• Nagumo Hidejiro

  Faculty of Agriculture, the University of Tokyo

• Tatsuhara Satoshi

  Faculty Of Agriculture The University Of Tokyo

• Nagumo Hidejiro

  Faculty Of Agriculture The University Of Tokyo:(present Office)college Of Agriculture And Veterinary

• Takahashi Tomoko

  Faculty Of Agriculture Okayama University:(present Address)central Research Laboratory Dainihon Joch

• Zheng Yuejun

  Faculty Of Agriculture The University Of Tokyo:(present Office)the Institute Of Statistical Mathemat

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