Graduate Thesis Or Dissertation
 

A simulation of the comparative costs and benefits of skyline strip thinning

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/c247dw477

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  • Strip thinning is recognized as a way of commercial thinning young-growth stands. strip thinning has been used worldwide. The purpose of this study was to explicitly evaluate the costs and benefits associated with skyline strip thinning in young Douglas-fir (Pseudotuqo menzesii Franco) stands in the Pacific Northwest and to compare the results with the conventional method of cable thinning. A computer simulation model was developed to integrate logging technology, silvicultural treatment, and economic concerns. The computer model was validated using DFSIM. Simulation runs were conducted using data from previous O.S.U. field studies. The integrated results were expressed in present net worth yields over the rotation for specific treatments. The results suggest that in economic terms, strip thinning is always inferior to the conventional method of low thinning. This is due primarily to the reduced growth and yield experienced from strip thinning when compared to the conventional method. It is unlikely, under any foreseeable situation, that enough Abstract approved: Eldon D. Olsen logging cost reductions can be realized for the first entry to make the strip thinning alternative competitive. Sensitivity analysis of dID ratio suggests that strip thinning would be the best alternative only at d/D ratios of 1.15 and greater.
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