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: Robin Wall Kimmerer
Publisher:
ISBN: 9780913098028
Category : Trees
Languages : en
Pages : 215
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Book Description
Articles about trees that have appeared in Orion Magazine.
Author: Eugene A. Vaganov
Publisher: Springer Science & Business Media
ISBN: 3540312986
Category : Science
Languages : en
Pages : 362
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Book Description
Dendrochronologists have long estimated the impact of climate on tree-ring growth by empirical-statistical methods. The use of the model is illustrated with examples from widely differing environments, and possible future directions for model development and application are discussed. As forests are the main carbon sink on land, the results are of great importance for all global change studies.
Author: Daniel Trembly MacDougal
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 52
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Book Description
Author: Sharon McConnell
Publisher: The Rosen Publishing Group, Inc
ISBN: 9780823981366
Category : Science
Languages : en
Pages : 20
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Book Description
1 Copy
Author: Frederick C. Meinzer
Publisher: Springer Science & Business Media
ISBN: 9400712421
Category : Nature
Languages : en
Pages : 511
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Book Description
Millions of trees live and grow all around us, and we all recognize the vital role they play in the world’s ecosystems. Publicity campaigns exhort us to plant yet more. Yet until recently comparatively little was known about the root causes of the physical changes that attend their growth. Since trees typically increase in size by three to four orders of magnitude in their journey to maturity, this gap in our knowledge has been a crucial issue to address. Here at last is a synthesis of the current state of our knowledge about both the causes and consequences of ontogenetic changes in key features of tree structure and function. During their ontogeny, trees undergo numerous changes in their physiological function, the structure and mechanical properties of their wood, and overall architecture and allometry. This book examines the central interplay between these changes and tree size and age. It also explores the impact these changes can have, at the level of the individual tree, on the emerging characteristics of forest ecosystems at various stages of their development. The analysis offers an explanation for the importance of discriminating between the varied physical properties arising from the nexus of size and age, as well as highlighting the implications these ontogenetic changes have for commercial forestry and climate change. This important and timely summation of our knowledge base in this area, written by highly respected researchers, will be of huge interest, not only to researchers, but also to forest managers and silviculturists.
Author: Henry Kock
Publisher:
ISBN: 9781554073634
Category : Climbing plants
Languages : en
Pages : 0
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Book Description
Provides information on growing native trees, vines, and shrubs from seeds, covering such topics as how to extract a seed, treating and germinating a seed, growth rate, and transplanting.
Author: Mary L. Duryea
Publisher:
ISBN:
Category : Trees
Languages : en
Pages : 4
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Book Description
Author: Joan DeYoung
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 159
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Book Description
"This is a forest measurements textbook written for field technicians. Silvicultural applications and illustrations are provided to demonstrate the relevance of the measurements. Special “technique tips” for each skill are intended to help increase data collection accuracy and confidence. These include how to avoid common pitfalls, effective short cuts, and essentials for recording field data correctly. The emphasis is on elementary skills; it is not intended to be a timber cruising guide"--BC Campus website.
Author: Brayton Fuller Wilson
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 156
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Book Description
Introduces the basic growth processes of trees and explains their interconnection.
