Results 261 to 270 of about 219,962 (312)

Bamboo worm collection activity and the changes in rural livelihoods in Yunnan Province, China. [PDF]

J Ethnobiol Ethnomed
Li Y, Hirota I.
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A Global Assessment of Plant and Animal Community Responses to Forest Management Over Time. [PDF]

Glob Chang Biol
van 't Veen H, Kuipers K, Schipper A, Marques A, Schelhaas MJ, Alkemade R.   +5 more
europepmc   +1 more source

Comparative efficacy and safety of no-touch versus conventional vein harvesting techniques in coronary artery bypass grafting: a systematic review and meta-analysis. [PDF]

Open Heart
Ali MA, Alam U, Khattak F, Bacha Z, Sajjad F, Khattak AI, Afridi A, Shahid S, Sheraz M, Khan NA, Sabir A, Ahmed R.   +11 more
europepmc   +1 more source

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Forest harvesting restriction and forest restoration in China

Forest Policy and Economics, 2021
Abstract The logging quota scheme was established in 1987 to control over-harvesting and promoting forest restoration in China, and it is expected to remain in place for many years to come. But the scheme has rarely been subject to careful empirical scrutiny.
Shilei Liu, Jun Xia
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Forest Harvest and Landscape Management

1994
When designing a plan to harvest forest products, forest managers face a variety of questions: Will the plan yield the most satisfactory profit commensurate with short- and long-term expectations? Does the plan promote or allow for the establishment of an adequate crop of new individuals of desirable species? Is the environmental impact acceptable? How
F. Herbert Bormann, Gene E. Likens
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Optimal harvest of industrial forests

Journal of Environmental Management, 1991
Optimal harvest of forests in a partly integrated forest-industry enterprise is studied. The present value of expected total profits of the enterprise is maximized. The timber supply curve of the industrial forest is derived. It is found that, in the environment of uncertainty in future timber prices and timber supply from non-industrial private ...
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Harvesting information to sustain forests

Communications of the ACM, 2003
We are building a Web-based system to provide easy access to documents for use by natural resource managers, scientists, and other interested parties in the Pacific Northwest. Initially, we are focusing on the Adaptive Management Area Program (www.fs.fed.us/r6/plan/adapt.htm) with the USDA Forest Service as the lead government partner in collaboration ...
Lois Delcambre, Timothy Tolle, null The Forest Project Team   +2 more
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Validating Forest Harvesting Production Equations

Transactions of the ASAE, 1992
The utility of production equations derived from time study data for forest harvesting operations is questionable when they are published without documented validation. Validation is frequently ignored, apparently because of the lack of standard procedures that are both theoretically sound and practically feasible.
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