2 edition of Effect of mechanical stress on growth and anatomical structure of red pine (Pinus resinosa Ait.) found in the catalog.
Effect of mechanical stress on growth and anatomical structure of red pine (Pinus resinosa Ait.)
J. Thomas Quirk
by Dept. of Agriculture, Forest Service, Forest Products Laboratory in Madison, Wis
Written in English
Bibliography: p. 699.
|Statement||J. Thomas Quirk, Diana M. Smith, and Frank Freese.|
|Contributions||Smith, Diana M., Freese, Frank, 1922-, Forest Products Laboratory (U.S.)., United States. Forest Service.|
|The Physical Object|
|Number of Pages||699|
Mean values per experiment, plant species (or genotype) and light level were collected for > 70 different physiological, anatomical, morphological, chemical or growth‐related traits. DLI levels were taken as specified by the authors, or estimated from the given light levels relative to daylight and the average DLI for the time of year of the Cited by: Symmetry is an eye-catching feature of animal body plans, yet its causes are not well enough understood. The evolution of animal form is mainly due to changes in gene regulatory networks (GRNs). Based on theoretical considerations regarding fundamental GRN properties, it has recently been proposed that the animal genome, on large time scales, should be regarded as a system which can Cited by: 2.
Tension wood is widespread in the organs of woody plants. During its formation, it generates a large tensile mechanical stress, called maturation stress. Maturation stress performs essential biomechanical functions such as optimizing the mechanical resistance of the stem, performing adaptive movements, and ensuring long-term stability of growing by: A wildfire, wildland fire or rural fire is an uncontrolled fire in an area of combustible vegetation occurring in rural areas. Depending on the type of vegetation present, a wildfire can also be classified more specifically as a brush fire, bushfire (in Australia), desert fire, forest fire, grass fire, hill fire, peat fire, vegetation fire, or veld fire.
The effect of vapour phase ammonia treatment on mechanical properties (fibre stress at elastic limit, modulus of rupture, modulus of elasticity, compressive stress at maximum load, compressive stress at elastic limit and hardness) of coconut (Cocos nucifera) wood is reported at around 12% moisture content.A comparison of results indicates quantitative differences but not statistically. Second-Growth Red Gum. Second-growth red gum occurs to any considerable extent only on land which has been thoroughly cleared. Throughout the South there is a great deal of land which was in cultivation before the Civil War, but which during the subsequent period of industrial depression was abandoned and allowed to revert to forest.
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Get this from a library. Effect of mechanical stress on growth and anatomical structure of red pine (Pinus resinosa Ait.): torque stress.
[J Thomas Quirk; Diana M Smith; Frank Freese; Forest Products Laboratory (U.S.); United States. Forest Service.]. Use of the process-based growth model CABALA to investigate the role of water-stress on the incidence of Resin Pockets. WQI report No APP pp. Frey-Wyssling, A., Effect of mechanical stress on growth and anatomical structure of red pine: Stem vibration stem vibration on tree growth and anatomical structure.
Vibration was used to simulate wind Valinger E, Lundqvist L and Sundberg B Mechanical bending stress applied during dormancy and (or) growth stimulates stem diameter growth of Scots pine seedlings.
Can. For. Res. 25, – CrossRef Google ScholarCited by: Quirk JT, Freese F () Effect of mechanical stress on growth and anatomical structure of red pine: stem vibration. Can J For Res – CrossRef Google Scholar Ray PM, Green PB, Cleland R () Role of turgor in plant cell by: 6.
rings common to most species (Figure ). These growth rings vary in width, depending on species and site conditions.
In many species of softwood, such as Douglas-fir and Southern Pine, there is a marked con trast between the earlywood and latewood, and growth rings are plainly Size: KB. The mechanical properties of wood considered in this book are: (1) stiffness and elasticity, (2) tensile strength, (3) compressive or crushing strength, (4) shearing strength, (5) transverse or bending strength, (6) toughness, (7) hardness, (8) cleavability, (9) resilience.
In connection with these, associated properties of importance are. J.T. Quirk, F. FreeseEffects of mechanical stress on growth and anatomical structure of red pine (Pinus resinosa Ait): stem vibration Can.
For. Res., 6 (), pp. Google ScholarCited by: 4. This chapter also includes a discussion of the effect of growth features, such as knots and slope of grain, on clear wood properties. The effects of manufacturing and service environ-ments on mechanical properties are discussed, and their effects on clear wood and File Size: 1MB.
pieces did have anatomical characteristics such as growth rings that occurred in consistent patterns within each piece.
Clear wood specimens are usually considered “homoge-neous” in wood mechanics. Many of the mechanical properties of wood tabulated in this chapter were derived from extensive sampling and analysis Size: 2MB. A second approach is to deter- mine empirically the effect of natural variation in anatomy (e.g., propor- tion of ray or earlywood tissue) on a mechanical property (e.g., modulus of elasticity, maximum stress and strain) of wood when tested in a certain axis (e.g., Schniewind, ; Beery et Cited by: Full text of "The mechanical properties of wood, including a discussion of the factors affecting the mechanical properties, and methods of timber testing" See other formats.
THE MECHANICAL PROPERTIES OF WOOD [Illustration: Frontispiece. _Photo by the author_. Photomicrograph of a small block of western hemlock.
At the top is the cross section showing to the right the late wood of one season's growth, to the left the early wood of the next season. The other two sections are longitudinal and show the fibrous. The observed patterns of radial variation in the mechanical properties of Scots pine in the current study (i.e., a rapid increase in the juvenile zone toward larger, more stable mature wood values) were similar to those reported in previous studies on Scots pine (Verkasalo and LebanAuty and Achim ), hybrid larch (Leban and Haines Cited by: 5.
Wood -- Mechanical properties. See also what's at your library, or elsewhere. Broader terms: Wood; Mechanical properties; Filed under: Wood -- Mechanical properties Longitudinal shrinkage in seven species of wood / [by R.A.
Hann] (Madison, Wis.: U.S. Dept. of Agriculture, Forest Service, ), by R. Hann (page images at HathiTrust) Items below (if any) are from related and broader terms. According to the uniform-stress principle of stem formation, the amount of leaf area a tree carries and the leverage it exerts on the stem determine the stem dimensions.
Within an even-aged monoculture, the leaf area per tree and the leverage placed on the stem are functions of tree density and tree height. The uniform-stress principle presents the means to translate density effects on crown Author: Thomas J.
Dean. Wood is a heterogeneous material, owing to its biological origin .There are large variations in cell structure between and within trees and among species [10,11].Within trees, the tracheid dimensions vary both with time of growth (earlywood/latewood) and with cambial age [12,13].Cell parameters such as length, wall thickness and width change systematically from early- to latewood and from Author: Besma Bouslimi, Ahmed Koubaa, Yves Bergeron.
Goals / Objectives 1) Study radial and longitudinal variation in wood structure and physiology, andthe environmental factors that alter these. This should improve our understanding of the effects of different silvicultural regimes on wood quality and tree growth. 2) Investigate the effects of growth rate on decay resistance, wood density, and wood structure.
The effect of needle removal treatments on the morphology, anatomy and wood density was less studied in the literature. Therefore, the aim this study was to investigate the effect of needle removal on the morphological, anatomical and wood density properties of the seedlings of Pinus nigra Arn.
(Anatolian black pine). The needles of the seedlings were removed in four different amounts (0%, 25%. Effect of torsion on different grades of hickory Cleavage of highly elastic wood Cross-sections of white ash, red gum, and eastern hemlock Cross-section of longleaf pine Relation of the moisture content to the various strength values of spruce Cross-section of.
Anatomical features may explain the phase morphology and mechanical properties of WPCs made without additives. An interphase factor affecting the mechanical properties and toughness of WPC is the slippage between phases determined using a viscoelastic model and its parameters as an analogy.
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