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Showing 1 to 20 of 22 for “"Red oak (Quercus rubra)"”.
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Fungi associated with northern red oak (Quercus rubra ) acorns
Poor regeneration of northern red oak is widespread in the central hardwood region. A two-part study was conducted to determine what fungi are associated with and cause cotyledon discoloration of northern red oak acorns. The field study determined that simulated small mammal notching, surface …
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Chemical interactions between rainfall and northern red oak (Quercus rubra l.) foliage
… simulated acid rain solutions and northern red oak (Ouercus rubra L.) leaves of trees growing in fertile, limestone-derived soil and less fertile, sandstone/shale-derived soil. Leaves harvested from trees growing on the fertile site had greater concentrations of total N, P, K, Ca, and Mn but …
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Performance of northern red oak (Quercus rubra) underplantings under five management regimes and across existing environmental gradients
Oaks (Quercus sp.) are dominant throughout much of the eastern broadleaf forests of the United States and are of great ecological, economical, and cultural value. Despite their prevalence in the overstory, many sites are lacking in the advanced reproduction necessary for its regeneration in future …
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Sensitivity of northern red oak (Quercus rubra L.) to variation of temperature and moisture availability along latitudinal and longitudinal climate gradients
… variations in climate using tree-ring data for Quercus rubra L. from 71 study sites across latitudinal and longitudinal temperature and precipitation gradients in eastern North America. Correlation analyses were used to identify significant site-specific associations between radial growth …
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"Determining the Cause of Abnormal Leaf Development ""Leaf Tatters"" on White Oak (Quercus Alba L.), and Northern Red Oak (Quercus Rubra L.)"
Emerging leaves of white oak and to a lesser extent northern red oak can develop abnormally. This abnormality is referred to as leaf tatters. The cause of tatters has previously been linked to environmental stress, insect feeding, or herbicide drift. We theorized that herbicide drift was the cause …
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Successive Land Surveys as Indicators of Vegetation Change in an Agricultural Landscape
… of anthropogenic disturbance conditions have altered the vegetation of the southern Appalachians during the past 200-years. The objective of this research was to identify the nature and timing of these vegetation changes in order to better understand the underlying causes. A total of 304 land …
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The Inhibitory Effect of Rhododendron maximum L. (Ericaceae) Thickets on Mycorrhizal Colonization of Canopy Tree Seedlings
… County, North Carolina. Planted seedlings of red oak (Quercus rubra) and hemlock (Tsuga canadensis) were harvested at the end of the first and second growing seasons. Litter manipulation had no effect on total mycorrhizal colonization. Mycorrhizal colonization and ramification index (# …
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Compaction behavior, mechanical properties, and moisture resistance of torrefied and non-torrefied biomass pellets
… carbon content and calorific value, as well as reduce the hydrophilic nature of woody-biomass. To facilitate the handling and use of torrefied biomass, densification (e.g. pelletizing) is used to compact it into standard uniform shape pellets with high density and mechanical strength. In this …
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Analysis of Red Oak Timber Defects and Associated Internal Defect Area for the Generation of Simulated Logs
… Research Station in Princeton, West Virginia for red oak (Quercus rubra, L.) logs. These data were analyzed to determine distributions for log and external defect attributes, and the information was used in the program to assure realistic log generation. An attempt was made to relate the external …
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Clean Fractionation of Biomass - Steam Explosion and Extraction
The fractionation of two biomass resources, red oak (Quercus rubra) chips and oil palm (Elaeis guineensis) trunk solids, into constitutive chemical components, cellulose, hemicelluloses (called "other carbohydrates") and non-carbohydrates (includes lignin, tannins, etc.), was studied quantitatively …
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Acorn Caching and Consumption of Weevil-infested Nuts: Possible Means of Tannin Circumvention for the Blue Jay
Blue jays (Cyanocitta cristata L.) are important predators on and dispersers of nuts of oaks and other Fagaceous trees in eastern North America. Acorns comprise much of the jay diet (Beal 1896), especially during the autumn months when jays may consume or cache a significant portion of an acorn …
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Analysis and Conservation of Native Forests at Kessler Mountain Fayetteville, Arkansas
… composition, structure, and tree age were measured at two old growth forest parcels on Kessler Mountain. Forest understory and overstory were surveyed and increment cores were collected from select overstory trees. The overstory of the post oak (Quercus stellata) site (Site A) was dominated by …
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Fundamental Analysis of Wood Adhesion Primers
… of the HMR mechanism of action, this work compared HMR with two other chemical treatments investigated as wood primers: alkyl-HMR (a-HMR), an HMR variant having reduced crosslink density, and a 5% solution of polymeric methylenebis(phenylisocyanate) in N-methylpyrrolidone (solution referred to …
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Seed dormancy and germination of northern red oak
Northern red oak (Quercus rubra l.), a valuable timber in species in the eastern United States, has a delayed growth in the early years of establishment. Freshly harvested northern red oak seed exhibit dormancy that may be broken by stratification or pericarp removal. In this research, germination, …
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Effects of nitrogen and water on growth, photosynthesis, and leaf properties of deciduous tree species with consequences for gypsy moth herbivory
… yellow birch (B. alleghaniensis), and red oak (Quercus rubra) for two years under varying levels of N and water availability in the field. Growth and biomass allocation were examined for the three species. Photosynthetic response was determined and feeding trials with gypsy moth larvae …
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Coordination of physiological and morphological acclimation of shade-grown tree saplings to late-season canopy gap formation
… four species of temperate deciduous hardwoods: red oak (Quercus rubra L.), sugar maple (Acer saccharum Marsh.), tulip poplar (Liriodendron tulipifera L.), and white ash (Fraxinus americana L.). Physiological acclimation responses included higher photosynthetic rates in shade-developed foliage …
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Half-Lap Cross Laminated Timber Pegged Joints
… spline joint. Currently, there are efforts to reduce the embodied energy associated with CLT buildings, leading to research exploring alternatives to metallic fasteners. This research investigates the shear yield load and stiffness of red oak (Quercus rubra) hardwood pegs in half-lap 3-ply …
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Growth and dieback of underplanted northern red oak seedlings under various light and moisture conditions
… (TNC) relations of underplanted northern red oak (Quercus rubra L.) seedlings were investigated. Greenhouse-grown red oak seedlings were subjected to 0, 63, or 92% shade and soil water potential was permitted to reach -0.3 or -2.0 MPa before rewatering. In a field study, underplanted …
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Post-Transplant Root Production, Mortality, and Periodicity of Landscape-Sized Shade Trees
… affected root system regeneration of northern red oak (Quercus rubra L.) and willow oak (Q. phellos L.), 2) determine the effect of transplant timing and nursery production system on root, shoot, and trunk growth periodicity of balled-and-burlapped (B&B) and pot-in-pot (PIP) sugar maple (Acer …
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Prescribed Fire Effects on Tree Grades and Wounds on the Monongahela National Forest, WV
… and adjacent, unburned locations were measured and graded using variable radius sampling, and additional landscape features and physiographic factors, such as aspect, elevation, and slope percentage, were also recorded at each variable radius sampling location. The most common, commercially …
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