Results 261 to 270 of about 96,135 (314)

Optimal Timber Harvest

1997
This chapter deals with renewable resources, a fixed amount of land on which timber is grown and regrown. The optimal harvest time is easy to calculate as we assume a known and consistent timber growth rate through periods of repeated timber regrowth.
Matthias Ruth, Bruce Hannon
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Governance and Timber Harvests

Environmental and Resource Economics, 2010
Resource economics theory implies that risks associated with weak governance have an ambiguous impact on extraction, with the net impact depending on the relative strengths of depletion and investment effects. Previous empirical studies have found that improved governance tends to reduce deforestation but to raise oil production.
Susana Ferreira, Jeffrey R. Vincent
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TIMBER HARVESTER: A MICROCOMPUTER-BASED SYSTEM FOR AUTOMATIC SELECTION OF TIMBER HARVESTING EQUIPMENT

Applied Engineering in Agriculture, 1992
The potential gains that could be realized from mechanization and automation of timber harvesting are significant. Mechanization increases production output and efficiency, and product quality. However, selecting an appropriate degree of mechanization to avoid under-utilization of expensive resources is a critical decision, and requires that the ...
null S. U. Randhawa, null T. M. Scott, null E. D. Olsen   +2 more
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Spatially constrained timber harvest scheduling

Canadian Journal of Forest Research, 1989
Multiple-use management of forests often requires imposition of spatial constraints on the selection of units for harvest. To satisfy such constraints, harvest units must be treated as integral units. A biased sampling search technique is used to find integer solutions to operationally sized problems. Solutions found for the sample problems are within
Anthony J. O'Hara, Bruce H. Faaland, B. Bruce Bare   +2 more
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Timber Harvesting with Fluctuating Prices

Forest Science, 1988
Abstract Because of volatility in demand, timber prices tend to fluctuate from year to year. Timber owners know today's price but are uncertain about tomorrow's prices. Traditional Faustmann harvesting ignores these random annual price fluctuations and prescribes harvests on the basis of expected prices.
Richard Brazee, Robert Mendelsohn
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Impacts of Timber Harvesting on Salamanders

Conservation Biology, 1994
The extent of the ecological impacts of clearcutting are the subject of much research and often heated debate, as recently illustrated in this journal (Duffy & Meier 1992; Duffy 1993; Elliott & Loftis 1993). Generally, arguments center around the severity of the effect on the biota and biodiversity.
Andrew N. Ash, Richard C. Bruce
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Montana’s forest products industry and timber harvest, 2014: Part I: Timber Harvest, Products and Flow

2020
This Resource Bulletin contains findings from a census of Wyoming's primary forest products industry for calendar year 2014. Part I of the series presents information on the volume of timber harvested in the State by ownership, species, product, and resource area. It also describes timber flow within the State and across State lines. This effort is the
Steven W. Hayes, Todd A. Morgan, Chris Witt   +2 more
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Timber Harvest in Interior Alaska

2006
The most active period of timber harvesting in the history of Alaska’s interior occurred nearly a century ago (Roessler 1997). The beginning of this era was the year 1869, when steam-powered, stern-wheeled riverboats first operated on the Yukon River (Robe 1943).
Tricia L. Wurtz, Robert A. Ott
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Environmentally sound timber harvesting

1993
Timber harvesting guidelines formulated for north Queensland rainforests allowed economically viable harvests with minimal ecological impact. Harvesting procedures sought to minimize soil erosion, silting and turbidity in streams, destruction of trees in the residual stand, and disruption of natural habitats and processes.
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A timber harvesting model for Austria

Computers and Electronics in Agriculture, 2000
Between 1981 and 1985 the Austrian National Forest Inventory (ANF) established a set of 5500 clusters, each with four permanent plots covering all Austrian forests. After the first remeasurement between 1986 and 1990 models were developed to predict tree growth, mortality and the behavior of forest owners in harvesting timber.
Hubert Sterba, Michael Golser, Martin Moser, Klemens Schadauer   +3 more
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