The influence of cut-block size and adjacency rules on harvest levels and road networks

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Abstract
Harvest levels and road construction and maintenance schedules are reported for combinations of cut-block size and exclusion-period length. Exclusion-period length had a greater effect than block size on harvest and road schedules. Harvests constrained by 20- and 30-year exclusion periods were, respectively, an average of 15 and 30% below the progressive clear-cutting solution. A combination of small openings and long exclusion periods led to significant reductions in harvests (43%) and caused a high percentage of the road network to be constructed in the early decades. These long-term, spatially constrained forest plans were formulated as integer programs and solved with a random search algorithm.

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