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The Importance of Juvenile Wood
1998The characteristics of juvenile wood can result in major problems with the final product and with mill efficiency, or they can be beneficial. Many of the problems and advantages related to the operational use of juvenile wood are described and discussed in Chapter 8, but several examples have been included here to show how important juvenile wood can ...
Bruce J. Zobel, Jerry R. Sprague
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1998
Although juvenile wood and its properties were briefly and generally defined in Chapter 1, in this chapter more definitive information is given about the formation and location of juvenile wood. The juvenile wood zone is difficult to define because it is the area from the pith outward where a rapid change in wood properties occurs, prior to the mature ...
Bruce J. Zobel, Jerry R. Sprague
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Although juvenile wood and its properties were briefly and generally defined in Chapter 1, in this chapter more definitive information is given about the formation and location of juvenile wood. The juvenile wood zone is difficult to define because it is the area from the pith outward where a rapid change in wood properties occurs, prior to the mature ...
Bruce J. Zobel, Jerry R. Sprague
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Corewood (Juvenile Wood) and Its Impact on Wood Utilisation
Current Forestry Reports, 2017Corewood (‘juvenile wood’) is found within the first 10–20 annual rings adjacent to the pith. This review focuses on describing the characteristics of corewood, the factors affecting its occurrence within a tree and the implications for wood utilisation.
John R. Moore, Dave J. Cown
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1998
This chapter looks in detail at the major effect juvenile wood has on the yield and qualities of both solid wood and fiber products. Figure 8.1 shows the large strength differences between juvenile and mature wood, which are more dramatic than differences in specific gravities. Juvenile wood is of importance in industry (Smith 1962), and as Polge (1964)
Bruce J. Zobel, Jerry R. Sprague
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This chapter looks in detail at the major effect juvenile wood has on the yield and qualities of both solid wood and fiber products. Figure 8.1 shows the large strength differences between juvenile and mature wood, which are more dramatic than differences in specific gravities. Juvenile wood is of importance in industry (Smith 1962), and as Polge (1964)
Bruce J. Zobel, Jerry R. Sprague
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Characteristics of Juvenile Wood
1998There are many characteristics of juvenile wood, described by investigators such as Knigge and Koltzenburg (1965), Foelkel et al. (1976), Thomas (1984), Zobel and Talbert (1984), Krahmer (1986), and Zobel and van Buijtenen (1989). The general attitude of most foresters is that juvenile wood is undesirable.
Bruce J. Zobel, Jerry R. Sprague
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1998
Numerous examples confirm the utility, and even the desirability of juvenile wood. However, in general, it is considered to be undesirable, especially in the conifers, due to its low specific gravity, short cells, adverse spiral grain and large microfibril angles.
Bruce J. Zobel, Jerry R. Sprague
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Numerous examples confirm the utility, and even the desirability of juvenile wood. However, in general, it is considered to be undesirable, especially in the conifers, due to its low specific gravity, short cells, adverse spiral grain and large microfibril angles.
Bruce J. Zobel, Jerry R. Sprague
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Characteristics Affecting Juvenile Wood
1998Although it has not been generally recognized, juvenile wood has many characteristics similar to those of reaction wood — compression wood in the conifers and tension wood in the hardwoods (Zobel 1975a). In the conifers, both juvenile wood and compression wood have short cells with flat micro fibrillar angles and often a high lignin content; in ...
Bruce J. Zobel, Jerry R. Sprague
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General Concepts of Juvenile Wood
1998As a tree grows, the wood produced varies both across the radius of the bole and along the height of the tree. Such within tree variation can be very large, especially in the conifers. When this variation is added to the inherent genetic differences in wood quality among trees, tremendous within species variation results.
Bruce J. Zobel, Jerry R. Sprague
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Prediction of wood stiffness, strength, and shrinkage in juvenile wood of radiata pine
Wood Science and Technology, 2008Development of optimal ways to predict juvenile wood stiffness, strength, and stability using wood properties that can be measured with relative ease and low cost is a priority for tree breeding and silviculture. Wood static modulus of elasticity (MOE), modulus of rupture (MOR), radial, tangential, and longitudinal shrinkage (RS, TS, LS), wood density (
Miloš Ivković +5 more
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Preferred crystallographic orientation in mature and juvenile wood
Zeitschrift für Kristallographie - Crystalline Materials, 2007Investigations of the crystallograpically organized regions of mature and juvenile Scots pine wood were performed. Experimental methods of X-ray diffraction were applied. Incomplete pole figures were measured, in order to calculate the orientation distribution function. The differences in the texture of the mature and juvenile wood were determined. The
Jan T. Bonarski, Wieslaw Olek
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