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Showing 1 to 20 of 32 for “"Pseudotsuga menziesii"”.
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Mycorrhizal fungus communities of Douglas-fir (Pseudotsuga menziesii) seedlings and trees: effects of proximity to residual trees
The influence of mature Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees in partially harvested stands on seedling growth and colonization by ectomycorrhizal fungi (EMF) is not well understood. To investigate this, Douglas-fir seedlings were planted near (<6 m) and far (>16 m) from 44- to …
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In vitro establishment, shoot multiplication, and rooting of Pinus strobus, Pseudotsuga menziesii, and Thuja occidentalis 'Hetz Wintergreen'
… in vitro rooting of Pinus strobus (white pine), Pseudotsuga menziesii (Douglas fir) and Thuja occidentalis 'Hetz Wintergreen'.
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Manganese uptake, transport, and toxicity in two varieties of Douglas fir (Pseudotsuga menziesii) as affected by mycorrhizae: from the cellular to the organismic level
… Mn sensitive Varietäten der Douglasie (Pseudotsuga menziesii), Viridis und Glauca in ihrer Mn-Aufnahme, subzellulären Lokalisation, Transport und Verteilung von Mangan unterscheiden. Unter kontrollierten Bedingungen konnte in beiden Varietäten unter Mn-Überschuss vor allem eine …
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Nonlinear Approaches to Predicting Diameter of the Largest Limb at Breast Height in Young, Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) Plantations Growing in the Pacific Northwest
… at breast height (DLLBH) in young, Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) plantations in the Pacific Northwest using a combined power exponential function. The first method examined admitting predictor variables as additional factors in the power function portion and linear terms in …
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Stem and Branch Diameter Response in Pruned Douglas-fir Plantations (Pseudotsuga menziesii var. menziesii): Implications for Volume and Clear Wood Production in the U.S. Pacific Northwest
Enhancement of timber quality from self-pruning in Douglas-fir stands typically begins to occur around 60-80 years of age. Due to 40-year rotations in production settings, this species has the potential to benefit from the silvicultural treatment of pruning. Previous literature indicates that …
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Soil Carbon, Nutrients, and Phosphorus Fractions: Responses to Weed Control and Harvest Residual Retention in two 10-Year-Old Douglas-fir (Pseudotsuga menziesii) Stands of the Pacific Northwest
… and after ten years in two Douglas-fir (Pseudotsuga menziesii) plantations in the Pacific Northwest. We observed increases in most nutrient concentrations with initial weed control compared with annual weed control at Matlock, with opposite trends at Molalla. Exchangeable Ca and Mg …
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Degli á Íslandi. Möguleikar og áskoranir við ræktun deglis í skógrækt á Íslandi
Degli (Pseudotsuga menziesii) er ein mikilvægasta trjátegundin í N-amerískri og evrópskri skógrækt vegna mikils vaxtarþróttar og verðmæts viðar. Ræktun deglis hefur verið mun minni og árangurslakari í Skandinavíu en í V- og Mið-Evrópu en innlandskvæmum (Pseudotsuga menziesii var. glauca) hefur …
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Identifying physiological and growth-allocation strategies among varying resource availabilities enabling Scotch broom (Cytisus scoparius (L.) Link) dominance in recently clearcut Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) forests of the western Pacific Northwest
Scotch broom is an aggressive, N-fixing invader of recently harvested Douglas-fir forests in the western Pacific Northwest. We expected Scotch broom’s ability to dominate a site and displace planted Douglas-fir to be mediated by available resources and the susceptibility of a recently harvested …
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Family x site interaction in a progeny test of coastal Douglas-fir
… environment interaction in coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) was evaluated for height at the 6th-, 7'11- and 124'. year and diameterat the 12th. year. Data collected from 15 families of the Experimental Project 708 of the BCMF were used. In addition, family …
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An 828 Year Streamflow Reconstruction for the Jordan River Drainage Basin of Northern Utah
… limber pine (Pinus flexilis) and Douglas-fir (Pseudotsuga menziesii) were obtained to perform the reconstruction. Results indicate significant correlation between tree growth and streamflow. A multiple linear regression model created with tree-ring width as the predictor of October - March …
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The effect of hot-pressing parameters on resin penetration and flakeboard layer properties
… (<i>Populus tremuloides</i>) and Douglas-fir (<i>Pseudotsuga menziesii</i>) flakes, and the layer properties of yellow poplar (<i>Liriodendron tulipifera</i>) flakeboard were investigated to determine how they were influenced by various pressing parameters. The evenness of penetration was found to …
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Investigating Differences in Douglas-fir and Southern Yellow Pine Bonding Properties
… (represented by Pinus taeda) and Douglas-fir (Pseudotsuga menziesii) mature and juvenile wood were examined in terms of density, chemical composition, surface energy, shear stress, % wood failure, and delamination. Density was measured using a QTRS density scanner. Loblolly pine contained a …
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Hyperspectral Reflectance and Stable Isotopic Nitrogen: Tools to Assess Forest Ecosystem Nitrogen Cycling
… throughout the geographic ranges of Douglas-fir (Pseudotsuga menziesii) and loblolly pine (Pinus taeda) to explore relationships between hyperspectral remote sensing, N stable isotope ratios ("15N) and growth response to nitrogenous fertilizer. In both species multiple linear regression models …
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Assessment of Prediction Bias in Crown Biomass Equations for Important Conifer Species of the Inland Northwest
… and under-predict the crown mass of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta). Further, it was found that the magnitude of the bias increased with diameter at breast height (DBH) for all species but western larch. The Jenkins et al. (2003) equations were found to …
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Assessment of Prediction Bias in Crown Biomass Equations for Important Conifer Species of the Inland Northwest
… and under-predict the crown mass of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta). Further, it was found that the magnitude of the bias increased with diameter at breast height (DBH) for all species but western larch. The Jenkins et al. (2003) equations were found to …
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Testing the forage preference of the American pika (Ochotona princeps) for use in connectivity corridors in the Washington Cascades
… tests, and one-sample t-tests. Douglas fir (<em>Pseudotsuga menziesii</em>), Sitka alder (<em>Alnus viridis</em>), willow (<em>Salix spp.</em>), and black cottonwood (<em>Populus balsamifera trichocarpa</em>) were the most selected species, and were recommended for planting in the upcoming …
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Adhesion Fundamentals in Spotted Gum (Corymbia citriodora)
… pine (Pinus taeda) and Douglas-fir (Pseudotsuga menziesii). Examining water wetting measurements, the Australian and North American woods exhibited some interesting similarities. However, methylene iodide wetting measurements revealed that the Australian woods were quite different …
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Role of mycorrhizal networks in dry Douglas-fir forests
… resource transfer. Interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) is an obligate ectomycorrhizal (EM) tree species that has high potential to form MNs with neighboring trees because of its receptivity to a diverse community of EM fungi. This MN potential is …
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Spatial and temporal dynamics of fire and vegetation change in Thunder Creek watershed, North Cascades National Park, Washington
… cal yr BP) Pinus contorta became uncommon and Pseudotsuga menziesii and Pinus monticola were dominant. Shade tolerant species including Thuja plicata and Tsuga heterophylla first appeared at the beginning of the late Holocene (5200 cal yr BP to present). Chamaecyparis nootkatensis appeared most …
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