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Juvenile Wood in Forest Trees

The trend in forestry is toward shorter rotations and more complete utiliza tion of trees.

Author : Bruce J. Zobel

Release : 2012-12-06

Publisher : Springer Science & Business Media

ISBN : 3642721265

File Size : 21.59 MB

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The trend in forestry is toward shorter rotations and more complete utiliza tion of trees. The reasons are: (1) financial pressures to obtain rapid returns on the forestry investment made possible by an earlier harvest; (2) enforced harvest of young plantations to maintain a continuing supply of cellulose for mills where wood shortages are experienced; (3) thinning young plantations, both because they were planted too densely initially and because thinning is done where long rotation quality trees are the forestry goal; (4) more intensive utilization is being done using tops and small diameter trees; and (5) there is interest in using young (juvenile) wood for special products because of its unique characteristics and the development of new technologies. The largest present-day source of conifer juvenile wood is from thinnings of plantations where millions of hectares of pine were planted too densely. Because of the better growth rate resulting from improved silviculture and good genetic stock, plantations will need to be thinned heavily. As a result of this trend, young wood makes up an increasingly larger proportion of the total conifer wood supply each year. Large amounts of juvenile wood from hard woods are also currently available, especially in the tropics and subtropics, because of the fast growth rate of the species used, which results in shorter rotations and ess~ntially all juvenile wood.

Juvenile Wood in Coniferous Trees

The influence of juvenile wood on wood quality in buildings, pulp-wood, and other end products. Also shows how forestry management practices affect juvenile wood formation.

Author : Thomas Thörnqvist

Release : 1993

Publisher :

ISBN :

File Size : 61.78 MB

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The influence of juvenile wood on wood quality in buildings, pulp-wood, and other end products. Also shows how forestry management practices affect juvenile wood formation.

Proceedings - Northeastern Forest Tree Improvement Conference

The distribution of latewood within the stems of many pine species is predictable ,
the general pattern being related to the distribution pattern of juvenile and mature
wood . A major aspect of the transition from juvenile to mature wood in pines ...

Author :

Release : 1968

Publisher :

ISBN :

File Size : 51.91 MB

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A Technical Workshop

Author : Doris Robertson

Release : 1986

Publisher : Forest Products Research

ISBN :

File Size : 76.20 MB

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Joint Proceedings of the Tenth Lake States Forest Tree Improvement Conference and the Seventh Central States Forest Tree Improvement Conference, September 22-24, 1971

The question was raised about the possibility of improving specific gravity and
other juvenile wood properties of such species as red pine , jack pine , larch , and
balsam fir . Comments from several geneticists who had worked with these ...

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Release : 1973

Publisher :

ISBN :

File Size : 37.48 MB

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Presents 12 papers concerning recent research in forest genetics, physiology, and allied fields. Species discussed include cottonwood, white spruce, jack pine, white pine, aspen, and others. Emphasizes the role of tree improvement in increasing wood-fiber production.

Australian Forestry

The book Juvenile Wood in Forest Trees forms part of the Springer - Verlag
Series in Wood Science , which , since its inception in 1983 , has produced over
22 monographs on subjects as diverse as xylem structure and the ascent of sap ...

Author :

Release : 2000

Publisher :

ISBN :

File Size : 85.98 MB

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Analytical Methods in Wood Chemistry, Pulping, and Papermaking

1 Chemical Composition of Wood and Pulps : Basic Constituents and Their
Distribution E. SJÖSTRÖM and U. WESTERMARK ... and analytical methods in
wood chemistry Although several sources of cellulose are available , wood
obtained from forest trees is the predominant material for making pulp and paper
. ... A high proportion ( 50 % ) of juvenile wood can be present in fast - grown
plantation trees .

Author : Eero Sjöström

Release : 1998-11-27

Publisher : Springer Science & Business Media

ISBN : 9783540631026

File Size : 21.72 MB

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In its broadest sense, and according to the traditional conception, wood chemistry is a comprehensive discipline, ranging from fundamental studies to practical applications. The manifold constituents, located in different morphological regions in the wood, results in an extreme complexity of wood chemistry. Ever more sophisticated endeavors needing fundamental studies and advanced analytical methods are necessary in order to delve deeper into various problems in pulping and papermaking. Gradually, new, improved ana lytical methods, originally developed for research purposes, are currently replacing many of the old "routine" methods in practical applications. Because of the expanse of the subject, an attempt to write a book of this size about analytical methods seems, perhaps, too ambitious. Of course, a whole book series of several volumes would be necessary to cover this topic completely. However, there is undoubtedly a need for a more condensed presentation which does not go into experimental details, but is limited to the basic principles of the analytical methods and illustrates their applica tions. The emphasis is on more advanced and potential methods, and partic ularly on those based on different types of spectroscopy and chromatography.

Forest Tree Improvement

INTRODUCTION It is well established that the central core of a stem , the so -
called core wood or juvenile wood , is ... This difference in basic density between
juvenile and mature wood causes problems for the forest tree breeder at the ...

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Release : 1977

Publisher :

ISBN :

File Size : 64.58 MB

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The Formation of Wood in Tropical Forest Trees

The tree ages investigated was 5 years old in 5 clones and 9 years old in
seedling . It is reported that the boundary between juvenile and mature wood is
about 15–20 years from pith mostly based on the investigation of conifers (
Watanabe et ...

Author :

Release : 2008

Publisher :

ISBN :

File Size : 35.26 MB

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Forest Trees of Australia

Forest Trees of Australia is the essential reference for observing, identifying and obtaining information on the native trees in this country.

Author : DJ Boland

Release : 2006-12-01

Publisher : CSIRO PUBLISHING

ISBN : 0643098941

File Size : 24.11 MB

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Forest Trees of Australia is the essential reference for observing, identifying and obtaining information on the native trees in this country. It describes and illustrates over 300 of our most important indigenous trees, which have been carefully selected for their environmental significance, their importance to the timber industry, or their prominence in our landscape. This new and thoroughly revised edition has been fully updated throughout and includes treatments of 72 additional species. New maps and photographs show us a wonderfully diverse range of forests, from mangrove swamps, tropical regions and deserts, to alpine areas and majestic stands of temperate forests. A colour section illustrates some of the major forest types of Australia and bark from a diverse range of species. Forest Trees of Australia is an unsurpassed guide to identification for horticulturists, botanists, foresters, students, farmers, environmentalists and all those who are interested in our native trees.

Formation and properties of juvenile wood in southern pines

Heredity versus environment in improving wood in forest trees. Journal of
Forestry. 37: 683-687. (general overview, general heredity) Kramer, P.R. 1957.
Tracheid length variation in loblolly pine. Tech. Rep. 10. Texas Forest Service. 22
p.

Author : Philip R. Larson

Release : 2001

Publisher :

ISBN :

File Size : 50.1 MB

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Applied Forest Tree Improvement

For products that require good tear strength , a high proportion of juvenile wood
is not desirable ; therefore , wood from young exotic softwood plantations is
inferior . Often tree form is very poor , resulting in a high proportion of reaction
wood ...

Author : Bruce Zobel

Release : 1984

Publisher : John Wiley & Sons

ISBN :

File Size : 25.75 MB

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General Concepts of Tree Improvement. Variation and Its Use. Provenance, Seed Source, and Exotics. Quantitative Aspects of Forest Tree Improvement. Selection in Natural Stands and Unimproved Plantations. Seed Production and Seed Orchards. Use of Tree Improvemente in Natural Forests and in Stand Improvement. Selection and Breeding for Resistance to Diseases, Insects, and Adverse Environments. Vegetative Propagation. Hybrids in Tree Improvement. Wood and Tree Improvement. Advanced Generations and Continued Improvement. Gain and Economics of Tree Improvement. The Genetic Base and Gene Conservation. Developing Tree Improvement Programs.

Forest Products and Wood Science

This seventh edition of the classic work: Contains new information on a variety of topics including: structural composites, non-structural composites, durability and protection, pulp and paper, energy and chemicals and global raw materials ...

Author : Rubin Shmulsky

Release : 2019-03-11

Publisher : Wiley-Blackwell

ISBN : 111942643X

File Size : 60.77 MB

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The updated seventh edition of the classic text on wood science and forestry The seventh edition of Forest Products and Wood Science: An Introduction offers a fully revised and updated review of the forest products industry. This classic text contains a comprehensive review of the subject and presents a thorough understanding of the anatomical and physical nature of wood. The authors emphasize its use as an industrial raw material. Forest Products and Wood Science provides thorough coverage of all aspects of wood science and industry, ranging from tree growth and wood anatomy to a variety of economically important wood products, along with their applications and performance. The text explores global raw materials, the increasing use of wood as a source of energy and chemicals and environmental implications of the use of wood. This edition features new material on structural composites, non-structural composites, durability and protection, pulp and paper, energy and chemicals, and global raw materials. This seventh edition of the classic work: Contains new information on a variety of topics including: structural composites, non-structural composites, durability and protection, pulp and paper, energy and chemicals and global raw materials Includes a fully revised text that meets the changing needs of the forestry, engineering, and wood science academics and professionals Presents material written by authors with broad experience in both the private and academic sectors Written for undergraduate students in forestry, natural resources, engineering, and wood science, as well as forest industry personnel, engineers, wood-based manufacturing and using professionals, the seventh edition of Forest Products and Wood Science updates the classic text that has become an indispensable resource.

Australian Forest Woods

With over 900 images, this is the most comprehensive guide ever written on Australian forest woods, both for the amateur and the professional wood enthusiast.

Author : Morris Lake

Release : 2019-01-20

Publisher : CSIRO PUBLISHING

ISBN : 1486307795

File Size : 39.30 MB

Format : PDF

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Australian Forest Woods describes about 130 of the most significant Australian forest trees and their wood. The introductory sections introduce the reader to the uniqueness and usefulness of forest trees. The book examines the forest tree species and their wood with photographs, botanical descriptions and a summary of the characteristics of the wood. A section on wood identification includes fundamental information on tree growth and wood structure. With over 900 images, this is the most comprehensive guide ever written on Australian forest woods, both for the amateur and the professional wood enthusiast. Macrophotographs of the wood are shown in association with a physical description of wood characteristics, which will aid identification. This technique was developed by Jean-Claude Cerre, France, and his macrophotographs are included in the book.

Wood and Fiber Science

Estimating the age of demarcation of juvenile and mature wood in Douglas - fir .
Wood Fiber Sci . ... Properties of wood from improved and intensively managed
trees . Forest Prod . J. 28 ( 10 ) : 61-72 . AND J. SENFT . 1986. Mechanical and ...

Author :

Release : 1999

Publisher :

ISBN :

File Size : 38.98 MB

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Juvenile Wood in California

Some indirect effects of environment on wood formation . In The Formation of
Wood in Forest Trees , H. H. Zimmermann ed . , Academic press , New York . pp .
345-365 . 1966 . Changes in chemical composition of wood 9 cell walls
associated ...

Author : William Paul Munk

Release : 1973

Publisher :

ISBN :

File Size : 43.4 MB

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Proceedings - Southern Forest Tree Improvement Conference

The wood near the pith of the tree has been variously referred to as " juvenile
wood " or “ core wood , ” and its properties differ from those of wood produced
farther from the pith ( Zobel et al . 1959 ) . We are all familiar with the S - shaped
height ...

Author :

Release : 1963

Publisher :

ISBN :

File Size : 40.74 MB

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