Abstract

Long-term planning for the management of multiple-species plantation forests can be a difficult undertaking, particularly when the forests have been created by afforestation over several decades so that the age-class structure of the compartments is seriously unbalanced. A time-staged linear-programming model is developed to assist forest managers in such situations. The model is expressly designed to be small enough to permit solutions with microcomputers of the type available to forest managers even in many developing countries. Investigations with the model for a forest project in Tanzania indicate that such models must be formulated to explicitly consider the structure of the forest at the planning horizon. Otherwise, harvesting schedules that seem to satisfy all of the forest manager's requirements during the planning horizon may lead to disastrously unbalanced harvesting patterns beyond the planning horizon.

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