2 edition of Intra-ring variations in mature Douglas-fir trees from provenance plantations found in the catalog.
Intra-ring variations in mature Douglas-fir trees from provenance plantations
Abdelazim Yassin Abdel-Gadir
Written in English
|Statement||by Abdelazim Yassin Abdel-Gadir.|
|The Physical Object|
|Pagination||168 leaves, bound :|
|Number of Pages||168|
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INTRA-RING VARIATIONS IN MATURE DOUGLAS-FIR TREES FROM PROVENANCE PLANTATIONS1 A. Yassin Abdel-Gadir2 Research Associate R. Krahmer Professor Emeritus and M. McKimmy Professor Emeritus Department of Forest Products College of Forestry Oregon State University Corvallis, OR 1 (Received April ) ABSTRACTCited by: RELATIONSHIPS BETWEEN INTRA-RING VARIABLElS IN MATURE DOUGLAS-FIR TREES FROM PROVENANCE PLANTATIONS1 A.
Yassin Abdel-Gadir2 Research Associate R. Krahmer Professor Emeritus and Professor Emeritus Department of Forest Products, College of Forestry Oregon State University Corvallis, OR 1 (Received April ) ABSTRACTCited by: 9.
The intra-ring wood density variations of the whole tree and the juvenile and mature wood for 44 T. occidentalis trees are shown in Figure 1a. Intra-ring wood density variation is also examined for selected ring groups (Figure 1b).
The cell structure of T. occidentalis wood is presented in Figure : Besma Bouslimi, Ahmed Koubaa, Yves Bergeron. The intra-ring wood density variations of the whole tree and the juvenile and mature wood for 44 T.
occidentalis trees are shown in Figure 1a. Intra-ring wood density variation is also examined for. The Wood Handbook (USDA Forest Service ) lists mature Douglas-fir and western hemlock compressive ultimate strength values as 7, psi and 7, psi at moisture content of 12 percent, a reduction in compression strength of specimens tested in this study by 33 and 44 percent for Douglas-fir and western hemlock, respectively, compared with.
Do Douglas-fir branches and roots have juvenile wood. Wood Fiber Sci Intra-ring variations in mature Douglas-fir trees. from provenance plantations.
X-ray densitometry was used to investigate some environmental and genetic influences on wood formation in young Douglas-fir trees growing in the Pacific Northwest. Sampling methods were determined from sectional analyses of even-aged stems and eleven growth-ring width and density variables were measured in several trials to elucidate' some of the causes of variation.
Breast height. 基金项目: 安徽省国际科技合作计划项目(),安徽高校产学研重点项目(kjA). McKimmy, M.D. () A variation and heritability study of wood specific gravity in yr-old Douglas-fir from known seed sources.
TAPPI, 49 (12), –9. Google ScholarCited by: 6. Abdel-Gadir A.Y., Krahmer R.L., McKimmy -ring variations in mature Douglas-fir trees from provenance plantations Wood Fiber Sci., 25 (), pp.
Google ScholarCited by: Title Author Year Series; Wetland forest: Stubbs, Jack. Scientific Journal (JRNL)-SRS-XXI: Return of longleaf to the Sandhills: Lotti, Thomas; Shipman, R. With the change of the season and summer well on its way, most tree nurseries have stopped dispatching tree stocks.
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Cerne 13(4): Nobuchi, T., C. Kami & M. Fujita. Radial variation of vessel and fiber dimensions in some plantation grown tropical trees as it relates to wood qualities, p. variation between trees in the same tree species, while the variations within each ring are the major source of variation (Jyske et al.
In addition to wood density, fibre characteristics (i.e. fibre length, fibre width, cell wall. As the forest industry in British Columbia becomes increasingly dependent on second-growth timber for its raw material supply, the question of wood quality becomes more relevant.
Accelerated growth in forest plantations, coupled with an earlier harvest, will lead to changes in the quality of the timber harvested. The influence of cambial aging, initial spacing, stem taper and growth rate was Cited by: Non-destructive evaluation (NDE) is defined by Pellerin and Ross  as: “The science of identifying the physical and mechanical properties of a piece of material without altering its end-use capabilities and then using this information to make decisions regarding appropriate applications”.NDE is a critical feature of numerous industries and has a long history of ensuring product quality Cited by: 2.
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Satellite Images, Maps and Photographs of the Irtysh Pine Forest pdf Кб. References Abdel-Gadir, A. Y., Krahmer, R. L., McKimmy, M. () Intra-ring variations in mature Douglas-fir trees from Provenance plantations. Wood and FIber Science, 25(2) Aicher, S., Dill-Langer, D. () Influence of cylindrical anisotropy of wood and loading conditions on off-axis stiffness and stresses of a board in tension.
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