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Author : Anonim
Publisher : Unknown
Page : 132 pages
File Size : 45,5 Mb
Release : 1998
Category : Douglas fir
ISBN : MINN:31951D028890648
Author : Anonim
Publisher : Unknown
Page : 132 pages
File Size : 43,7 Mb
Release : 1998
Category : Douglas fir
ISBN : UCR:31210022825846
Author : Robert O. Curtis
Publisher : Unknown
Page : 123 pages
File Size : 46,9 Mb
Release : 2000-01
Category : Electronic
ISBN : 0788186604
Silvicultural knowledge & practice have been evolving in the Pacific Northwest for nearly a century. This report on research & management activities includes: foundations & definitions; historical development of silviculture in the Douglas-Fir Region; forest conditions, stand development, & management goals; generation methods; shaping development of young natural stands & plantations; harvesting considerations; providing diverse structures & habitats; maintaining site productivity; damaging agents & forest health; management choices; information needs; policy questions; references; management scenarios; & glossary.
Author : Anonim
Publisher : Unknown
Page : 176 pages
File Size : 44,7 Mb
Release : 2007
Category : Douglas fir
ISBN : MINN:31951D02974976P
Silvicultural practices in the Douglas-fir region evolved through a combination of formal research, observation, and practical experience of forest managers and silviculturists, and changing economic and social factors. This process began more than a century ago and still continues. It has had a great influence on the economic well-being of the region and on the present characteristics of the regions forests. This long history is unknown to most of the public, and much of it is unfamiliar to many natural resource specialists outside (and even within) the field of silviculture. We trace the history of how we got where we are today and the contribution of silvicultural research to the evolution of forest practices. We give special attention to the large body of information developed in the first half of the past century that is becoming increasingly unfamiliar to both operational foresters andperhaps more importantlyto those engaged in forestry research. We also discuss some current trends in silviculture and silviculture-related research.
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 48,9 Mb
Release : 2004
Category : Douglas fir
ISBN : MINN:31951D02977270E
This report describes the origin, design, establishment and measurement procedures and first results of a large long-term cooperative study comparing a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii) stands managed for multiple objectives. Regimes consist of (1) conventional clearcutting followed by intermediate thinning; (2) retention of reserve trees to create a two-aged stand; (3) small patch cuts dispersed within a thinned matrix, repeated at approximately 15-year intervals to create a mosaic of age classes; (4) group selection within a thinned matrix on an approximate 15-year cycle; (5) continued thinning on an extended rotation; and (6) an untreated control. Each of these regimes is on operationsize units (about 30 to 70 acres each). Output variables to be evaluated include conventional timber growth and yield statistics, harvest costs, sale layout and administration costs, aesthetic effects and public acceptance, soil disturbance, bird populations, and economic aspects. Descriptive statistics and some initial results are presented for the first replicate, established in 1997-98.
Author : British Columbia. Silviculture Interpretations Working Group
Publisher : Unknown
Page : 76 pages
File Size : 48,8 Mb
Release : 1992
Category : Douglas fir
ISBN : CORNELL:31924073235545
These guidelines are a correlation of many guidelines for uneven-aged stand management already in place in many forest districts and regions in British Columbia. The guidelines include a statement of principles, standards, and procedures and information on applicable stands; stratification; pre-harvest cruise and silviculture prescription; cutting permits; monetary assessments; pre-work guidance for harvesters; harvest monitoring; post-harvest assessments; stocking surveys; free growing surveys; and reporting.
Author : Anonim
Publisher : Unknown
Page : 262 pages
File Size : 50,7 Mb
Release : 2002
Category : Forest management
ISBN : MINN:31951D029601210
Author : British Columbia. Ministry of Forests,BC Environment
Publisher : Unknown
Page : 84 pages
File Size : 41,7 Mb
Release : 1995
Category : Forest management
ISBN : MINN:31951D00901707H
A silviculture prescription is a site-specific plan that describes the forest management objectives for an area. A prescription prescribes the method for harvesting the existing forest stand and a series of silviculture treatments that will be carried out to establish a free growing crop of trees in a manner that accommodates other resource values as identified. This document describes the contents of what silviculture prescription plans must contain in British Columbia to comply with the Forest Practices Code. It includes information on general requirements for the plan as well as specific requirements for tenure identification, management objectives, degree of consistency with other plans, ecological and resource information, forest health assessment and prescription, soil conservation, actions to accommodate forest resource values, silvicultural systems, harvesting, fire hazard abatement, silviculture treatments, stocking standards, and mapping.
Author : Anonim
Publisher : Unknown
Page : 618 pages
File Size : 41,8 Mb
Release : 2007
Category : Forests and forestry
ISBN : CORNELL:31924101545782
Author : Robert A. Monserud,Richard W. Haynes,Adelaide C. Johnson
Publisher : Springer Science & Business Media
Page : 532 pages
File Size : 43,9 Mb
Release : 2013-04-17
Category : Technology & Engineering
ISBN : 9789401703093
Public debate has stimulated interest in finding greater compatibility among forest management regimes. The debate has often portrayed management choices as tradeoffs between biophysical and socioeconomic components of ecosystems. Here we focus on specific management strategies and emphasize broad goals such as biodiversity, wood production and habitat conservation while maintaining other values from forestlands desired by the public. We examine the following proposition: Commodity production (timber, nontimber forest products) and the other forest values (biodiversity, fish and wildlife habitat) can be simultaneously produced from the same area in a socially acceptable manner. Based on recent research in the Pacific Northwest, we show there are alternatives for managing forest ecosystems that avoid the divisive arena of 'either-or' choices. Much of the work discussed in this book addresses two aspects of the compatibility issue. First, how are various forest management practices related to an array of associated goods and services? Second, how do different approaches to forest management affect relatively large and complex ecosystems?
Author : Anonim
Publisher : DIANE Publishing
Page : 100 pages
File Size : 42,5 Mb
Release : 2024-06-29
Category : Electronic
ISBN : 1422324869
Author : Nathan Jeremy Poage
Publisher : Unknown
Page : 50 pages
File Size : 48,8 Mb
Release : 2007
Category : Forest management
ISBN : MINN:31951D029812508
We review 12 large-scale silviculture experiments (LSSEs) in western Washington and Oregon with which the Pacific Northwest Research Station of the USDA Forest Service is substantially involved. We compiled and arrayed information about the LSSEs as a series of matrices in a relational database, which is included on the compact disc published with this report and available online at http://www.fs.fed.us/pnw/research/lsse. The LSSEs are both spatially and temporally large scale, with experimental treatment units between 5 and 100 acres and proposed study durations of 20 to 200 years. A defining characteristic of the LSSEs is that a broad range of response variables are measured to characterize the response of forest ecosystems to experimental treatments. We discuss the general value and limitations of the LSSEs and highlight some possible roles that can be played by the LSSEs in addressing management issues emerging at the beginning of the 21st century.
Author : Brian J. Palik,Anthony W. D'Amato,Jerry F. Franklin,K. Norman Johnson
Publisher : Waveland Press
Page : 343 pages
File Size : 50,5 Mb
Release : 2020-05-15
Category : Technology & Engineering
ISBN : 9781478645238
Classical silviculture has often emphasized timber models, fundamentally based in production agriculture. This books presents silvicultural methods based in natural forest models—models that emulate natural disturbances and development processes, sustain biological legacies, and allow time to take its course in shaping stands. These methods, dubbed “ecological forestry,” have been successfully implemented by foresters for decades managing a wide variety of forestlands. Ecological silvicultural strategies protect threatened and rare species, sustain biological diversity, and provide habitat for game and non-game species, all while providing timber in profitable ways.
Author : Anonim
Publisher : Unknown
Page : 150 pages
File Size : 50,8 Mb
Release : 2001
Category : Biodiversity conservation
ISBN : MINN:31951D02977209H
Author : Pacific Northwest Research Station (Portland, Or.)
Publisher : Unknown
Page : 116 pages
File Size : 44,8 Mb
Release : 1999
Category : Forests and forestry
ISBN : MINN:31951D029778043
