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Creator:: Barnard, H. R., Brooks, J. R., and Bond, B. J.
Abstract:: The inter-relationships among δ¹³C and δ¹⁸O in tree ring cellulose and ring width have the potential to illuminate long-term physiological and environmental information in forest stands that have not been monitored. We examine how within-stand competition and environmental gradients affect ring widths and the stable isotopes of cellulose. We utilize...
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Full Text:: ( r) , P v al ue ( P) a nd n um be r of o bs er va tio ns ( N ) fo r th e re

Creator:: Grotta, A. T., Leichti, R. J., Gartner, Barbara L., and Johnson, G. R.
Abstract:: ASTM standard sizes for bending tests (either 50 × 50 mm or 25 × 25 mm in cross-section) are not always suitable for research purposes that characterize smaller sections of wood. Moreover, the ASTM standards specify loading the sample on the longitudinal-tangential surface. If specimens are small enough, then the...
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Full Text:: , OR 97331 and G. R. Johnson Research Geneticist USDA Forest Service Pacific Northwest Research

Creator:: Gupta, R., Gebremedhin, K. G., and Cook, J. R.
Abstract:: Metal-plate-connected wood trusses with semi-rigid joints were investigated by the matrix method of structural analysis. The element-stiffness matrix and fixed-end forces of an individual member with one or both ends semi-rigid were derived as modifications of the idealized cases. The case of unequal elastic connections at two ends of a...
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Full Text:: joints ANALYSIS OF METAL-PLATE-CONNECTED WOOD TRUSSES WITH SEMI-RIGID JOINTS R. Gupta, K. G

Creator:: Gartner, Barbara L. and Johnson, G. R.
Abstract:: Stem sinuosity is a highly visible stem-form trait in the leaders of fast-growing Douglas-fir (Pseudotsuga menziesii var. (Mirb.) Franco) trees, yet its cause is unknown. We tested the hypotheses that sinuous stems have longer expanses of primary growth than nonsinuous stems (putting the leader at higher risk curvature, induction of...
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Full Text:: , there was a tendency toward a significant relationship between the two years (r = 0.272, p = 0.0893

Creator:: Coops, N. C. and Waring, R. H.
Abstract:: The 3-PGS (physiological principles for predicting growth using satellite data) model generates monthly estimates of transpiration, photosynthesis, and net primary production (NPP), the latter derived as a fixed proportion (0.47) of gross photosynthesis. To assess the reliability of a simplified process model (3-PGS) to predict the productive capacity of coniferous...
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Full Text:: relative productivity regionally or under different environmental change scenarios (Landsberg et al. 2001

Creator:: Saunders, Mike R. and Puettmann, Klaus J.
Abstract:: The interactive impact of overstory canopy closure, understory brush control, and simulated white-tailed deer (Odocoileus virginianus Zimmermann) herbivory (i.e., clipping) on growth and survival of underplanted white pine (Pinus strobus L.) seedlings was examined. Clipping was conducted in April 1996 and 1997 at three intensities (control, 0% previous year’s growth...
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Full Text:: herbivory on growth and survival of white pine seedlings Mike R. Saunders and Klaus J. Puettmann Abstract

Creator:: Nairn, John A., Friesner, R., and Sauer, Kenneth
Abstract:: We have expanded on the results of an earlier paper [J. Chem. Phys. 72, 221 (1980)] which deals with a method for determining the response of a static, partially ordered ensemble of molecules to various types of electromagnetic probes. In this paper we consider types of spectroscopy whose response depends...
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Full Text:: rotations [R l (al) ••• Rn(an )] and weighting function G(al , a2, ••• , an) that will generate the

Creator:: Zahora, Andrew R. and Morrell, Jeffrey J.
Abstract:: A closed-tube bioassay with Poria placenta was used to measure residual fungistatic vapors in wood fumigated with methylisothiocyanate (MIT). This bioassay showed an inverse linear relationship between fungal growth and the amount of MIT in the wood samples. For fumigated increment-core sections of unseasoned Douglas-fir heartwood (4.8 mm in diameter...
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Full Text:: VOLATILE METHYLISOTHIOCYANATE RESIDUES IN FUMIGANT-TREATED WOOD' Andrew R. Zahora and Jeflrey J

Creator:: Rhatigan, R. G. and Morrell, J. J.
Abstract:: Large quantities of smaller diameter materials are available in the overstocked forests of eastern Oregon and Washington, but the costs of removing these materials and the long distances from markets sharply reduce the potential of this resource. Failure to thin these forests will sharply increase the likelihood of catastrophic wildfires....
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Full Text:: Oregon and Washington contain vast areas of over- stocked forests (Gast et al. 1991). These forests

Creator:: Zahora, Andrew R. and Morrell, Jeffrey J.
Abstract:: High concentrations of the fumigant methylisothiocyanate (MITC) will effectively control decay fungi in large wood structures, but the fungitoxicity of low MITC concentrations and the influence of wood moisture content (MC) on its performance are not well understood. The MC of Douglas-fir heartwood greatly influenced the susceptibility of the decay...
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Full Text:: OF METHYLISOTHIOCYANATE IN DOUGLAS-FIR HEARTWOOD' Andrew R. Zahora2 Graduate Student

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