Global ETD Search
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 16 of 16 for “"Christmas tree"”.
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Developing risk management framework for wellhead and christmas tree equipment
… marketplace the manufacturing wellhead and christmas tree equipment companies need to implement of risk management process, to analysis potential risk and failure. This thesis attempted to investigate an organization’s perception of risk management in manufacturing of wellhead and christmas …
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Economic aspects of Christmas tree production and marketing in Virginia
An economic description and analysis of Christmas tree production was made for the benefit of Virginia's farm and other landowners. The purpose of the study was to aid in determining if investment in Christmas trees was likely to be economically successful, and to improve plantation management on …
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Commodifying the Conifer: The Rise of the Christmas Tree Industry in the United States
<p>Christmas trees are culturally significant symbol of Christmas and embedded within American culture. This dissertation uses the Christmas tree as an object to make historical connections to cultural, environmental, and economic changes. By connecting the meanings endowed to the Christmas tree, I …
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Predatory Mites (Acari: Phytoseiidae) in Fraser fir Christmas Tree Plantations in the Southern Appalachians of North Carolina
North Carolina State University Theses Forestry and Environmental Resources.;North Carolina State University Theses Forestry and Environmental Resources.
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The association and transmission of Leptographium procerum (Kendr.) wing., by root feeding insects in Christmas tree plantations
… Wingf., is the most serious problem facing Christmas tree growers of eastern white pine, (Pinus strobus L.). Limited studies have shown an association between PRD affected trees and insect infestations, and L. procerum has been recovered from field collected insects. The objectives of this …
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Development and evaluation of trapping studies for Hylobius pales (Herbst) and Pissodes nemorensis Germar (Coleoptera: curculionidae) in Virginia Christmas tree plantations
… pales and P. nemorensis populations in Virginia Christmas tree plantations. Labor intensive pit traps, using natural host materials and synthetic volatiles, caught significantly more weevils than PVC pitfall traps baited with synthetic volatiles alone. No differences in trap catches were observed …
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Evaluating the nutritional status of Fraser fir [Abies fraseri (Pursh) Poir.] Christmas trees using foliar analysis and DRIS application
Three studies were conducted with Fraser fir Christmas trees to determine the variation in foliar nitrogen (N) , phosphorus (P) , potassium (K), calcium (Ca), and magnesium (Mg) levels among plantation ages, sample locations within the crown, and effects due to seasonal changes. Extensive variation …
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Distribution and Diversity of Oomycete Root Pathogens Affecting Fraser Fir Christmas Tree Production in the Southern Appalachian Mountains and Evaluation of Elite Poplar Genotypes Performance Against Phytophthora Inoculation.
North Carolina State University Theses Forestry & Environmental Resources.
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Variants of compound models and their application to citation analysis
… methods, randomised quantile residual plots and Christmas tree plots. The Christmas tree plots clearly illustrate whether the observed data are within fluctuation bounds under the fitted model, but the randomised quantile residual plots utilise the cumulative distribution, and hence are …
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Influence of site factors and vascular conductivity on the development of procerum root disease
… problem in eastern white pine (Pinus strobus L.) Christmas tree plantations in VIrginia. Procerum root disease is caused by Leptographium procerum (Kendr.) Wingf which is believed to be transmitted by the pales weevil Hylobius pales (Herbst). Symptoms of procerum root disease include reduced shoot …
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Applying the diagnosis and recommendation integrated system(DRIS) to Fraser fir Christmas trees
… of Fraser fir [Abies fraseri (Pursh)Poir.] Christmas trees and prescribing fertilizers is not well understood. Agricultural researchers have established critical yield levels for agronomic crops that are objective measures of crop quality and have associated these yields with nutrient …
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Η ΣΗΜΑΣΙΑ ΤΟΥ ILEX AQUIFOLIUM ΑΠΟ ΔΑΣΟΠΟΛΙΤΙΚΗ, ΟΙΚΟΛΟΓΙΚΗ ΚΑΙ ΔΑΣΟΒΟΤΑΝΙΚΗ ΣΚΟΠΙΑ
… DURING THE RECENT YEARS, BECAUSE IS USED AS CHRISTMAS TREE AS WELL AS DECORATIVE TREE IN INTERNAL PLACES, GARDENS AND COTTAGES. UNDER THESE CIRCUMSTANCES THE SPECIES IS GAINING SPECIAL MERCHANT INTEREST AND MAY BE A SIGNIFICANT SOURCE OF INCREASING THE ANNUAL INCOME OF PEOPLE LIVING NEARBY …
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Procerum root disease physiology and disease interactions with ozone
… (Kendr.) Wingf., has been epidemic in Virginia Christmas tree plantations since 1990. Symptoms of chlorosis, wilt, and decreased apical growth resemble those of water stress. Resin infiltration of the xylem at the stem base may be responsible for vascular occlusion leading to severe water …
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Developing DRIS norms for Fraser fir Christmas trees
… [Abies fraseri (Pursh) Poir.] is an important Christmas tree species in Virginia. Because it is responsive to fertilization, and because most Fraser fir growers fertilize their crop, a scientifically-based nutrient diagnosis and fertilizer recommendation system is needed. The objective of this …
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"To keep Christmas well": gender and consumerism in the Age of Industrialization
Christmas evolved as an outgrowth of the mid-winter pre-Christian festivals of Saturnalia, Kalends, and Yule, to an overly commercialized, mass-market driven enterprise. Modern Christmas celebrations are inextricably connected to place, family, and food, but today’s observances have one thing in …