|Statement||by Robert R. Maeglin.|
|Contributions||Forest Products Laboratory (U.S.)|
|The Physical Object|
|Number of Pages||108|
Get this from a library! Juvenile wood, tension wood, and growth stress effects on processing hardwoods. [Robert R Maeglin; Forest Products Laboratory (U.S.)]. Wood formed during the first three or so years of life of a tree is generally dominated by the so-called juvenile w46 (Figure 19(a)).Although formed by the vascular cambium, juvenile wood differs from SW because its formation is relatively close to the SAM, which influences the vascular cambium activity in a poorly understood manner. 47 In general, juvenile wood tends to have high. Maeglin RR () Juvenile wood, tension wood, and growth stress effects on processing hardwoods. In: Applying the latest research to hardwood problems: Proceedings of the 15th annual hardwood symposium of the Hardwood Research Council, Cited by: 8. Reaction wood is of widespread occurrence. In hardwoods, reaction wood is formed on the upper side of a bend or lean and so is termed tension wood. If the growth rings are eccentric it is likely that tension wood is present. Tension wood often is difficult to recognize without microscopic examination, and can be found in straight stems.
trees have a higher proportion of juvenile wood, reaction wood, and growth stress as compared to older trees (Maeglin ). Growth stresses are more critical in smaller logs from young fast growing trees because of steeper growth stress gradients (Boyd , Hillis ). In addition, growth stress . February Kretschmann, David E. Influence of juvenile wood content on shear parallel, compression, and tension transverse to grain strength and mode I. Tension wood acts by pulling the stem into the erect position and thus generates tensile stress rather than the compression stress that occurs in compression wood. Not all hardwoods form tension wood; notable exceptions are the vessel-less angiosperms, such as Pseudowintera and Sarcandra (Aiso et al., ), which form compression wood-like. Maeglin RR () Juvenile wood, tension wood and growth stress effect on processing hardwoods. Proceeding of the 15th Annual Symposium of the Hardwood Research Council; May 10–12, Memphis.
to 20 growth rings are known as juvenile wood and this usually displays greater longitudinal shrinkage than more mature wood. The trunk cross-section in both the sapwood and heart-wood is characterized by distinctive annual growth rings. These occur because the wood formed during the early part of the season when the growth is more active (early-. Maeglin RR () Juvenile wood, tension wood and growth stress effects on processing hardwoods. In: Applying the latest research to hardwood problems: Proceedings of the 15th annual hardwood symposium of the hardwood Research Council, . The transition from juvenile wood (formed during the first 10–20 years of a tree's life, i.e. in young trees and in the crown of older trees; Zobel and Sprague, ) to mature wood (MW) is another major transition typically found in wood during a tree's life (Fig. 4A). As demand for wood continues to increase and as new trees are developed. Maeglin RR () Juvenile wood, tension wood, and growth stress effects on processing hardwoods. Applying the latest research to hardwood problems (proceedings of the 15th annual hardwood symposium of the Hardwood Research Council). Hardwood Res Council, Memphis, pp – Google Scholar.