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Showing 1 to 20 of 55 for “"White Oak"”.
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Biomass Estimation Using the Component Ratio Method for White Oak
With higher demands on biomass, the ability to accurately estimate the amount in a stand is more important now than ever before. Existing models currently in use by the Forest Inventory and Analysis (FIA) program of the United States Department of Agriculture (USDA) Forest Service include the …
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Development of floral primordia and prediction of flowering in white oak (Quercus alba L.)
… was undertaken to gain a better understanding of oak floral development and flower crop variability as they relate to acorn crop variability. The first part traced the ontogeny of staminate and pistillate primordia of white oak (Quercus alba L.). It was found that staminate inflorescences are …
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Fungi associated with the pistillate flowers of white oak (Quercus alba L.) and their effect on pollen germination
… in high frequency from the pistillate flowers of white oak. These genera occur worldwide and although several species of each genera are parasitic on crop plants, they are primarily saprophytic in the forest ecosystem. Of the three genera, only <u>Cladosporium</u> is parasitic on <u>Q. alba</u>, …
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Effects of Air vs. Air+Soil Heating During a Simulated Heat Wave on White Oak (Quercus alba) and Black Oak (Quercus velutina)
… of both shoots and roots separately for both white and black oak seedlings by insulating the soil during heat-stress to the shoot (35 <i>vs.</i> 40°C for 4 days, white oak; 35°C for 8 days, black oak). Interestingly, at moderate heat-stress temperature (35°C), net photosynthesis declined and …
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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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Growth hormones and their relationship to seed dormancy in Quercus
Northern red oak (Q. rubra L.) seeds were dormant and required 10 weeks of moist, cold stratification before a large percentage of the seeds would germinate. White oak (Q. alba L.) seeds were not dormant and germinated immediately upon falling from the mother tree. A transfer of mass from the …
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Investigation of Through-Tenon Keys on the Tensile Strength of Mortise and Tenon Joints
… by measuring tensile load and stiffness of white oak (Quercus alba) and Douglas-fir (Pseudotsuga menziesii) joints with four- and 11-inch tenons with one and two keys and comparing these results to mathematical models developed from the National Design Specification of Wood Construction …
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Successive Land Surveys as Indicators of Vegetation Change in an Agricultural Landscape
… surveys. Results showed significant shifts in white oak (Quercus alba L.), chestnut (Castanea dentate Marsh. Borkh.), chestnut oak (Quercus prinus Wild.), black oak (Quercus velutina Lam.), red oak(Quercus rubra L.), black locust (Robinia pseudoacacia L.), yellow poplar (Liriodendron tulipifera …
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Using dendrochronology to identify species-specific ice storm damage in Delaware
… to sample four species of trees (southern red oak [Quercus falcate ], white oak [Quercus alba], loblolly pine [ Pinus taeda], and yellow poplar [Liriodendron tulipifera ]) affected by the ice storm. The objectives of this study are to: (1) explore the species-specific growth rates and responses …
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Effects of tannins on protein digestibility and detoxification activity in gray squirrels (Sciurus carolinensis)
… activity. In the Acorn experiment, Northern red oak acorns (Quercus rubra), white oak acorns (Q. alba), or rat chow were fed to squirrels. Levels of phenols, condensed tannins, and hydrolyzable tannins were higher in red oak acorns than white oak acorns and were likely responsible for the lower …
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The Effects of Pruning on Wind Resistance of Shade Trees
… Freeman maple (Acer x. freemanii), swamp white oak (Quercus bicolor (Willd.)) and shingle oak (Quercus imbricaria (Michx.)) were tested before and after pruning to determine the effectiveness of pruning on reducing drag and bending moment. Pruning methods were thin, reduce and raise and …
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A survey of the food habits of the gray squirrel (Sciurus carolinensis) in Montgomery County, Virginia
… In the fall, hickory nuts (36%), fungi (26%), white oak acorns (12%), and black walnuts (10%) were the major foods. Red oak acorns (36%) and combinations of acorns, hickory nuts, and walnuts (22%) constituted most of the winter diet, followed by fungi (16%) and black walnuts (10%). Red oak …
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Site quality factors affecting Acer saccharum, Quercus rubra and Quercus alba abundance and height growth rates in young even-aged stands located in central Missouri
… and height growth rates of sugar maple, white oak, and northern red oak in young even-aged, 5-29-year old, forests of central and east central Missouri in the lower Missouri and lower Osage River valleys. Relationships were examined in plots samples in 44 stands through examination of the …
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Stream functional response to mountaintop removal and valley fill coal mining
… streams in central West Virginia. Leaf packs of white oak and red maple were installed in these streams in December 2007, leaves were collected in January, February, March, April, and June of 2008, and leaves were washed and processed in the lab. Leaf breakdown rates were significantly slower in …
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Digestibility of Foods and Anthropogenic Feeding of Black Bears in Virginia
… eastern black bear foods, including northern red oak <i>(Quercus rubra)</i>, white oak <i>(Q. alba)</i>, and chestnut oak acorns <i>(Q. prinus)</i>, squawroot <i>(Conopholis americana)</i>, high-protein dogfood, shelled corn, and doughnuts. All diets were evaluated for nutrient content as well as …
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Detection of the Oak Wilt Pathogen in Sapwood of Northern Oak Species Using PCR Technology
Early and accurate diagnosis of oak wilt, caused by Ceratocystis fagacearum, is important when disease control action is planned. When laboratory diagnosis is needed, standard isolation protocols that are used rely on high quality samples and require up to 14 days for incubation. New methods, …
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Modeling the impact of gypsy moth defoliation in individual tree mortality and basal area growth of northern hardwoods of central Pennsylvania
… of Akaike's information criterion) of .613 for white oak. The inclusion of defoliation in the models had a varied effect. For four of the species percent defoliation was not significant. For hickory and white oak respectively, percent defoliation raised the R value by .305 and .290 percentage …
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Long-Term Study of Prescribed Fire Effects on Stand Dynamics and Oak Regeneration Potentials in Degraded Upland Oak-Hickory Stands in Northwestern Arkansas
<p>Upland oak-hickory forests in the Ozark Mountains of northwestern Arkansas and south central Missouri were impacted by oak decline during the early 2000s. This decline event was caused by predisposing (e.g., mature, dense stand conditions), inciting (i.e., drought), and contributing (e.g., red …
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Growth and Physiology of Several Urban Tree Species in Soils Disturbed by Construction Fill or Compaction
… in urban forestry. Groups of 22-year-old white oak (Quercus alba) and 13-year-old sweetgum (Liquidambar styraciflua) were subjected to one of three treatments: a control, fill (20 cm of subsoil spread over the root zones), and compacted fill (same as fill soil, but compacted). …
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