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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 579 for “"Oak"”.
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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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Natural Availability of Oak Wilt Inocula
Made available in DSpace on 2015-05-12T17:00:49Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0007838.PDF: 4623857 bytes, checksum: 21995eee0efdec6e609223560cfcdc7f (MD5) Previous issue date: 1954
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Reciprocal Transplant and Machine Learning Study of Oak Mistletoe on Three Host Oak Species in Santa Margarita, California
<p>At Santa Margarita Ranch, California, oak mistletoe (Phoradendron villosum) parasitizes valley oak and blue oak but cannot be found growing on coast live oak despite its abundance and ability to parasitize coast live oak in other areas. It seems as though this species of mistletoe is …
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Ozone effects on red oak root dynamics
… an ozone fumigation experiment on northern red oak seedlings and mature trees was conducted. It was hypothesized that carbon reallocation to replace foliage damaged by ozone would decrease fine-root production and turnover. The red oak trees and seedlings were fumigated for three years with …
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Overstory density and its effect on oak regeneration abundance and oak understory height growth in the Missouri Ozark Highlands
… with increasing overstory density for white oaks, red oaks, and non-oaks. A relatively small increase in overstory basal area significantly decreased success probabilities for the red oaks, white oaks and non-oaks. For understory growth, the probability of obtaining height growth thresholds …
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Solar drying of green oak (Quercus spp.) lumber
… green condition of a mixture of red and white oak 5/4 inch lumber during winter conditions in Blacksburg, Virginia. The solar kiln was of a semi-greenhouse type, having a capacity of 150 board feet and provided with an air circulating fan. Both the south facing vertical wall and the south …
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Experimental Control Studies on the Oak Wilt Disease
Made available in DSpace on 2014-12-05T20:30:09Z (GMT). No. of bitstreams: 1 5904519.pdf: 3368695 bytes, checksum: 7efe22ad0590fd7d1daa37d1c0a54615 (MD5) Previous issue date: 1959
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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 Tornado Damage, Prescribed Fire, and Salvage Logging on Oak (Quercus Spp.) Saplings in Upland Oak Forests in Northern Mississippi
… folloby long periods of fire suppression, oak dominated forests, woodlands, and savannahs are being replaced by an unprecedented forest ecosystem. In Mississippi, these new forest systems are dominated in the mid- and understory by mesophytic species such as red maple (Acer rubrum L.) and …
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The Oak Wilt Fungus, Ceratocystis Fagacearum (Bretz) Hunt: Studies of Therate and Extent of Fungus Penetration in Oak Roots and the Nature of a Toxic Principle in Oak Heartwood Which Inhibits Growth of the Fungus
Made available in DSpace on 2014-12-05T20:30:07Z (GMT). No. of bitstreams: 1 0025195.pdf: 2982230 bytes, checksum: 0a28da1c01691d52a0ea62167f8adba8 (MD5) Previous issue date: 1957
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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)
… 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 internal …
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Is Chir Pine Displacing Banj Oak in the Central Himalaya? Socioeconomic Implications for Local People and the Conservation of Oak Forest Biodiversity
… chir pine (Pinus roxburghii) is replacing banj oak (Quercus leucotrichophora) in the Central Himalaya. Five sites with three different types of forests (banj oak, chir pine and mixed oak-pine) were sampled to compare the diversity of their vegetation and to assess the impact of this ongoing …
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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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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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Moisture Gradient Measurement During Kiln Drying of Red Oak
… In this project, moisture gradients in red oak will be measured through four different techniques----<i><b>bandsaw slicing, Forstner bit layering, flaking and razor blade slicing</i></b>. The first two techniques are found in the literature. The last two are developed in this study. The …
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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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