Author: Maxwell Ralph Jacobs
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 15

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Author: Robert R. Archer
Publisher: Springer Science & Business Media
ISBN: 3662025116
Category : Technology & Engineering
Languages : en
Pages : 251

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Book Description
Although over 40 years have passed since Jacobs (1945) convincingly established the basic radial pattern of residual growth stress in growing trees, yet this phenomenon is still not widely appreciated in wood science and technology circles. This is in spite of the fact that the presence of these stresses of sizeable magnitudes has long been recognized as a primary cause of shakes and splits in logs as well as the warping of lumber sawn in the green condition. The presentation of the subject of growth stresses in trees presents some special problems due to the wide range of specialists who potentially might have an interest in the subject. For example, tree physiologists interested in questions such as the relation of mechanical stress to stem taper and the role of reaction wood and gravity forces in determining tree crown form encounter growth stress models. Silvi culturists interested in the relation ofthinning practices to wood quality find that wood properties are correlated with growth stress levels which are in turn significantly changed by cutting practices. Wood techno logists interested in the relation of residual growth stress gradients in green logs to the dimensional quality of sawn and seasoned lumber are forced to take a more quantitative approach to the effect of growth stresses than might have been the case in the past.

Author: M. R. Jacobs
Publisher:
ISBN:
Category : Tree trunks
Languages : en
Pages : 13

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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 550

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Author: George Tsoumis
Publisher: Elsevier
ISBN: 1483159523
Category : Technology & Engineering
Languages : en
Pages : 289

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Book Description
Wood as Raw Material: Source, Structure, Chemical Composition, Growth, Degradation and Identification focuses on the scientific advancements in general forestry. This book discusses the value of wood as a raw material as looked upon from biological, botanical, and technical perspective. Organized into 12 chapters, this book starts with an overview of the importance of forest trees as sources of wood. This text then examines the chemical composition and ultrastructure of wood. Other chapters explain the biological mechanisms of wood and bark formation by forest trees. This book discusses as well the certain fundamental relationships between tree growth and wood structure. The final chapter deals with wood identification in North America and European forest tree species. This book is a valuable resource for students engaged in the study of forest management, wood science and technology, tree physiology, silviculture, forest soils, forest genetics, forest engineering, pulp and paper technology, forest and wood pathology, and other specialized areas. Foresters and technologists will also find this book useful.

Author: Bruce J. Zobel
Publisher: Springer Science & Business Media
ISBN: 3642740693
Category : Technology & Engineering
Languages : en
Pages : 376

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Book Description
Wood is the usual end product of a forestry operation. Because of its importance, numerous studies have been made relative to wood prop erties, the causes of wood variation, and how best to develop wood for desired products. There is voluminous literature related to these subjects, but it is neither well known nor appreciated by foresters because the publications are often not available or are not well understood by the forester or by those who use the wood. Frequently, the literature is confusing and contradictory, making it difficult for the nonspecialist to use what information is available. In order to produce and use wood efficiently, the variation pat terns within trees, among trees within species, and among species must be understood. This also requires some knowledge of the causes of variation and the effects of different wood properties upon utiliza tion. The information about variation patterns, their causes, and con trol and effect upon the product must be known by the tree grower, the tree breeder, and the tree harvester as well as by those who ultimately convert wood into a final, salable product.

Author: Karl J. Niklas
Publisher: University of Chicago Press
ISBN: 9780226586304
Category : Business & Economics
Languages : en
Pages : 634

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In this book, the author analyzes plant form and how it has evolved in response to basic physical laws. He examines the ways these laws limit the organic expression of form, size, and growth in a variety of plant structures and in plants as whole organisms, drawing on both the fossil record and studies of extant species.

Author:
Publisher:
ISBN:
Category : Wood
Languages : en
Pages : 580

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Book Description

Author: International Union of Forestry Research Organizations. Section 41. Working Groups of Wood Quality, Sawing and Machining, and Tree Chemistry
Publisher:
ISBN:
Category : Lumber
Languages : en
Pages : 404

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Author: Leslie Thornley Carron
Publisher: Canberra : Australian National University Press
ISBN:
Category : Forests and forestry
Languages : en
Pages : 244

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