Helicopter yarding systems have become a popular tool in
removing timber from steep slopes, sensitive soils, limited access
areas, and environmentally sensitive stands. Little is known about
the system's dynamics. This study is part of a research project to
explore "advanced" logging systems as to their economic efficiency
and environmental...
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 authors describe a new,theoretical methodology for evaluating the replacement of a single piece of logging equipment with a predetermined new model. The example is for a specific piece of equipment and gives results unique to the data-base analyzed, but the application typifies procedures, required data, and results of the...
