نتایج جستجو برای: medium timber
تعداد نتایج: 244573 فیلتر نتایج به سال:
Across the globe and in the U.S., it is anticipated that forest resources in rural and urban settings will be affected by climate-change induced impacts to forest growing conditions, including CO 2 fertilization and disturbance regimes. These changing forest conditions are projected to trace through to changes in management regimes, production practices, and, potentially, the uses of timberland...
Individual tree mapping in the forest is usually done by several techniques such as the sequential target and point origin mapping. Generally, the estimation of standing timber volume operation is considered a difficult task as ground survey is expensive. Most of this task is being done on the ground and takes a lot of time to be accomplished. However, the use of airborne remote sensing such as...
Tropical timber plantations provide a variety of environmental services, including recovery of biodiversity on degraded lands. For example, plantations can speed forest successional processes by improving microsite conditions and attracting seed dispersers, thus promoting woody regeneration. Timber species have been hypothesized to differ in understory recruitment success. In the present resear...
2 Variation of colour and selected physical and mechanical properties related to artificial drying of sawn silver birch (Betula pendula Roth) timber from plantations Veikko Möttönen Dissertationes Forestales 13 3 Möttönen, V. 2005. Variation of colour and selected physical and mechanical properties related to artificial drying of sawn silver birch (Betula pendula Roth) timber from plantations. ...
Issue For a variety of reasons, community forestry is not always well suited to existing forest certification schemes. Using the case of Nepal, this paper considers the extent to which promoting the trade in non‐ timber forest products can complement, or even provide an alternative to, forest certification for timber while promoting sustainable community forestry. The paper develops recent work...
This study aimed to verify technical potential of using waste from wood veneers and plywood as a raw material for the production MDP. The variance analysis panels density was carried out. Physical-mechanical properties were evaluated by comparing them with international standards variance. averages subjected covariance, at level 5% probability. Finally, Pearson’s correlation between performed. ...
Methyl bromide (MB) has a number of desirable features as a fumigant for durable commodities and timber including a rapid speed of treatment, low infrastructure requirements, recognition by quarantine authorities, broad registration for use, good penetrant ability, and rapid airing after exposure. There is, however, a range of existing and potential alternatives to MB which, alone or in combina...
The present paper provides some ideas about how decisions concerning maintenance of timber bridges should be made in a rational way. First, a brief discussion is provided concerning the evolution of maintenance strategies in general and it is suggested that maintenance of timber bridges should follow a risk-based approach. Then the discussion moves on to the condition assessment of timber bridg...
Efforts to increase wood mobilization have highlighted the need to appraise drivers of short-run timber supply. The current study aims to shed further light on harvesting decisions of private forest owners, by investigating optimal harvesting under uncertainty, when timber revenues are invested on financial markets and uncertainty is mitigated by news releases. By distinguishing between aggrega...
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