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Evaluation Of Best Management Practices To Reduce Nutrients Runoff In Watersheds In Arkansas, Hector German Rodriguez Diaz
Evaluation Of Best Management Practices To Reduce Nutrients Runoff In Watersheds In Arkansas, Hector German Rodriguez Diaz
Graduate Theses and Dissertations
There are many non point sources (NPS) of pollution issues across the state of Arkansas. Each region of the state has different concerns. Many watersheds have been included in the Arkansas's 2008 303(d) list for NPS impairments with sediment and nutrients being the primary causes of concern. This research hypothesized that there are no cost or net returns risks when adopting best management practices (BMPs) to control nutrients runoff and that selection, timing, placement and cost have no impact on the implementation of BMPs. Using two priority watersheds, the L'Anguille River and the Lincoln Lake, as examples, the environmental benefits …
Alternative Sampling And Analysis Methods For Digital Soil Mapping In Southwestern Utah, Colby W. Brungard
Alternative Sampling And Analysis Methods For Digital Soil Mapping In Southwestern Utah, Colby W. Brungard
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Digital soil mapping (DSM) relies on quantitative relationships between easily measured environmental covariates and field and laboratory data. We applied innovative sampling and inference techniques to predict the distribution of soil properties, soil attributes, taxonomic classes, and dominant vegetation across a 30,000-ha complex Great Basin landscape in southwestern Utah. This arid rangeland was characterized by rugged topography, diverse vegetation, and intricate geology. Environmental covariates calculated from digital elevation models (DEM) and spectral satellite data were used to represent factors controlling soil development and distribution. We investigated optimal sample size and sampled the environmental covariates using conditioned Latin Hypercube Sampling (cLHS). …
Effects Of Vegetation Structure On Fire Behavior And Wiregrass Seedling Establishment In Xeric Sandhills, Evelyn Wenk
Effects Of Vegetation Structure On Fire Behavior And Wiregrass Seedling Establishment In Xeric Sandhills, Evelyn Wenk
All Theses
The xeric sandhills on Carolina Sandhills National Wildlife Refuge have a monospecific overstory of longleaf pine and an understory dominated by turkey oak and wiregrass. The understory vegetation is spatially heterogeneous within stands, with small patches dominated by either turkey oak or wiregrass, or lacking understory vegetation. I described the fuel complexes created by the variable vegetation structure, in terms of their chemical and physical properties, and used prescribed fire to test for differences in fire behavior among the vegetation types. In addition, I compared the effects of the vegetation structure and below-ground competition on the establishment of wiregrass.
Turkey …
Relationships Between Impervious Surfaces And Surface Water Quality In Hunnicutt Creek Watershed, Clemson, South Carolina, Swaros Dumrichob
Relationships Between Impervious Surfaces And Surface Water Quality In Hunnicutt Creek Watershed, Clemson, South Carolina, Swaros Dumrichob
All Theses
Hunnicutt Creek watershed drains to the eastern edge of Clemson University campus. The landscape of this part of campus changes from a natural park like botanical garden to one dominated by academic buildings. The campus area has changed in time as well with increasing impervious areas such as roads, parking lots, roof tops and decreasing the amount of forested land leaded to the impairment of water quality in this creek. The objectives of this study were to evaluate the relationships between water quality indicators and percent imperviousness at a watershed level. Eight sampling sites were assigned at each sub-watershed within …
Adhesion Of Jurkat Cells In Defined Media And Substrates, Sarah De Leo
Adhesion Of Jurkat Cells In Defined Media And Substrates, Sarah De Leo
Honors Theses
No abstract provided.
Development Of Basic Meat Science Curriculum Standards For Secondary Agricultural Education: Delphi Model, John Duke
All Dissertations
ABSTRACT
The purpose of this study was to develop basic meat science topics and standards for secondary agricultural education. A Delphi panel was used to develop the instrument. The Delphi panel was composed of four members from academia and industry and four
from the top ten national meat FFA Career Development Events coaches from 2000 to 2005. Two Delphi rounds were used to develop the survey instrument. The modified Delphi started with an outline of basic meat science topics developed by an expert panel
from 16 university basic meat science syllabi. The Delphi panel added or deleted topics, topics were …
Comparisons Of Native And Non-Native Lady Beetles: Habitat Distribution And Interactions With Prey And Competitors, Christy J. L. Finlayson
Comparisons Of Native And Non-Native Lady Beetles: Habitat Distribution And Interactions With Prey And Competitors, Christy J. L. Finlayson
Electronic Theses and Dissertations
Lady beetles (Coleoptera: Coccinellidae), as a group, are considered beneficial because they prey on plant pests. A number of studies suggest that non-native species introduced for biological control have replaced native species in agriculture. Agricultural and non-agricultural habitats were thus surveyed in Maine to determine if native species were still dominant in some areas. In 2004 and 2005, 3,487 and 2,903 beetles were collected, respectively, with non-native species dominant in all but one habitat (coniferous forest). Native species were found in very low numbers in all habitats surveyed. Comparisons between species were then conducted to determine if differences exist that …
An Assessment Of Cognitive Level Of Instruction Presented In Animal Science Courses And The Impact On Development Of Cognition In Undergraduates, Laura White
All Dissertations
To be successful in life, students will need to learn to make good decisions; many of them. Quality decision making is paramount for student success in future employment and their personal lives. To make a quality decision, one must weigh all possible options and understand as many of the implications of that decision as possible. Relating options and outcomes to previous experience is advantageous. The qualities mentioned above are reliant on critical thought processes. It is imperative that graduates seeking employment possess a balanced combination of base knowledge and independent thought combined with critical thinking ability. In order to produce …
Management Strategies To Improve Development Of Replacement Heifers Utilizing Tall Fescue-Based Systems, Margaret Miller
Management Strategies To Improve Development Of Replacement Heifers Utilizing Tall Fescue-Based Systems, Margaret Miller
All Theses
Research was conducted to determine the effect of tall fescue and alternative management regimens on reproduction in replacement beef heifers. Angus _ Simmental heifers (n = 48; 318 ± 4.99 kg initial BW) stratified by weight and pubertal status were assigned to one of three replicated grazing treatments: (1) toxic endophyte-infected tall fescue (TF); (2) toxic endophyte-infected tall fescue with a soybean oil supplement (TFO); or (3) mixed winter annual species (cereal rye, annual ryegrass, crimson clover and hybrid turnip) (M). Tall fescue endophyte infection level was between 74 and 94%. Pastures were grazed from December 12 to April 24. …
Population Reconstruction Model To Analyze Harvest And Banding Data For Mourning Doves In South Carolina, Christopher Chumbley
Population Reconstruction Model To Analyze Harvest And Banding Data For Mourning Doves In South Carolina, Christopher Chumbley
All Theses
Mourning dove (Zenaida macroura) call count indices for South Carolina indicate a negative trend over the past 42 years (1.2% decline per year, p < 0.05). Total harvest estimates in the state increased from 2003-2007. Banding data from doves banded in South Carolina and data from annual examinations of harvested mourning dove wings during 2003-2007 were collected and analyzed. Data sets used contained 6,600 banded doves and 21,240 harvested dove wings. Survival estimates from band recovery analyses for adult and juvenile doves were 0.44 (± 0.04 SE) and 0.35 (± 0.06 SE), respectively. Survival rates were constant from year to year while recovery rates differed annually for adults and juveniles. The average natural mortality estimates for adults and juveniles in the presence of hunting were 0.45 ± 0.122 and 0.47 ± 0.189, respectively, during the study period. The average harvest and kill rates for adults and juveniles were also estimated. Age-at-harvest ratios adapted from annual wing examinations during the harvest were used with recovery rates to derive estimates of annual productivity in the population. Linear regression analysis of productivity estimates found a significant decline in productivity during 2003-2007 (-0.21, p < 0.10). The average productivity estimate was 1.43 (± 0.33 SE) juveniles per adult and the estimated productivity required to maintain a stable population was 1.60 (± 0.30 SE). The effects of constant survival rates, varying hunting mortality estimates and declining productivity estimates were discussed in relation to breeding populations in rural areas of South Carolina.
Evaluation Of Streptomycetes For Biological Control Of Gummy Stem Blight Disease Of Cantaloupe, Shima Chaudhary
Evaluation Of Streptomycetes For Biological Control Of Gummy Stem Blight Disease Of Cantaloupe, Shima Chaudhary
Theses and Dissertations - UTB/UTPA
Studies were conducted to evaluate the efficacy of Streptomyces isolates for the biological control of gummy stem blight (GSB) in cantaloupes (Cucumis melo var. ‘Primo’) in south Texas. Plants were monitored for seedling emergence, lesions, mortality and plant growth under laboratory, greenhouse and field conditions. Comparison of treatment groups indicated a significant reduction in plant mortality and enhanced growth of infected plants exposed to three Streptomyces isolates (MA1F4#2, WI1B#5, and MA2A4 #2), which appear to be most effective when used in combination. In all three experiments, GSB infection was associated with a significant reduction in reflectance of near-infrared wavelengths (700-1,100 …
Evaluating The Effects Of Organic And Conventional Inputs On Soil Chemical And Biological Properties In A Four-Year Vegetable Rotation And The Investigation Of Soil Microbial Properties On Plant Gene Expression, Audrey Law
University of Kentucky Doctoral Dissertations
The objective of this research was to determine the effects of conventional inputs on soil chemical and biological properties compared to organic systems in a four year vegetable rotation. Tillage and cover crops were the same in all treatments to avoid confounding factors often present in similar research. Additional experiments investigated plant gene expression in organic and conventional management systems and in soils with decreased microbial diversity. Experimental plots were prepared in the spring of 2004; four replications of three management treatments, organic, low-input and conventional, were arranged in a randomized complete block design. The rotation consisted of edamame soybean, …
The Association Between Alcohol Sales And County Level Economic Growth In Kentucky, Julia Hinkle Rollins
The Association Between Alcohol Sales And County Level Economic Growth In Kentucky, Julia Hinkle Rollins
University of Kentucky Master's Theses
This thesis evaluates the effectiveness of using alcohol sales as an indicator of development or lag associated with development in Kentucky counties using summary statistics, shift-share analysis and an econometric model. The summary statistics are used to evaluate possible lines of causality and the Shift-share analysis and econometric model deal the specific characteristics of the county that are assumed to be influenced by the sale of alcohol. Limitations to the county level data were limiting to the time period evaluated in this thesis. As a result, much of the findings were inconclusive as to the relationship between county level economic …
The Importance Of Nutrition Label Usage In The Context Of Obesity: A Cross-Country Study Of The Usa And Turkey, Emine Bayar
The Importance Of Nutrition Label Usage In The Context Of Obesity: A Cross-Country Study Of The Usa And Turkey, Emine Bayar
University of Kentucky Master's Theses
Obesity, the second leading cause of preventable death in the U.S., and related health problems increase people’s concerns about healthy food consumption. The increased prevalence of obesity is a major concern of societies both in developed and developing countries. Nutrition label usage has been increasing due to the link between diet and health. This study intends to provide a framework for describing profiles of consumers who are more likely to use nutrition labels in USA and Turkey, a developing country with increasing obesity rates in recent years. Empirical results present similarities and differences between consumers’ attributes for food label usage …
The Impact Of Perceived Barriers To Export: An Analysis Of Kentucky Agricultural And Food Processing Firms, Kelly A. Davidson
The Impact Of Perceived Barriers To Export: An Analysis Of Kentucky Agricultural And Food Processing Firms, Kelly A. Davidson
University of Kentucky Master's Theses
As intra-industry trade increases in U.S. agricultural and food processing industries, the historical agricultural trade surplus is tightening. In efforts to maintain the trade surplus a focus has shifted towards the promotion of agricultural and processed food exports among small and medium sized firms. This study intends to identify and evaluate the potential for exports among small to medium sized agricultural and food processing firms in Kentucky through a collection of survey data. The objectives of this thesis are to identify the state’s product marketing opportunities and product specifications for international exports while identifying transaction requirements for potential exports. An …
An Interaction Between Risk Perceptipton And Trust In Response To Food Safety Events Across Products And Regions, And Their Implicaitons For Agribusiness Firms, Jonathan D. Shepherd
An Interaction Between Risk Perceptipton And Trust In Response To Food Safety Events Across Products And Regions, And Their Implicaitons For Agribusiness Firms, Jonathan D. Shepherd
University of Kentucky Master's Theses
Food safety events receive substantial media coverage and can create devastating economics losses for agribusiness firms. It is unclear what factors influence consumers’ purchasing decisions before or after a food safety event occurs. The objectives of this study is to identify these factors that influence purchasing decisions, determine how consumers respond to hypothetical food safety events, and compare these findings across different products and geographical regions. The data for this research was obtained from two surveys. One survey concerned fresh produce while the second focused on meat products. The SPARTA model, based on the Theory of Planned Behavior, is used …
Hedging To Safety: A Political Economy Of Derivatives, Risk And Agriculture In The Developing World, Sasha Coler Breger Bush
Hedging To Safety: A Political Economy Of Derivatives, Risk And Agriculture In The Developing World, Sasha Coler Breger Bush
Electronic Theses and Dissertations
It has become common for researchers and international development institutions to recommend the use of derivative instruments to developing country farmers and policymakers as a means of insuring agricultural incomes against the threats posed by volatile global commodity prices. Despite such enthusiasm, very little research to date examines whether or not derivative instruments actually can deliver income support to agricultural producers who face commodity price risk. This dissertation evaluates these recommendations, focusing upon the potential income security benefits of hedging with futures instruments for coffee farmers in Mexico, Brazil and Uganda during the 1998-2002 coffee crisis. The three-part quantitative and …
Symbiotic Effects Of The Fungus Glomus Sp. On Chromium(Iii), Chromium(Vi), And Lead(Ii) Uptake By Mesquite (Prosopis Sp.): A Novel Method To Remediate Heavy Metals, Jack A. Arias
Open Access Theses & Dissertations
The indiscriminate disposal of lead (Pb) and chromium (Cr) containing wastes has resulted in a detrimental impact on environmental health. Lead and Cr are in the EPA priority list due to their degree of toxicity on humans, animals, plants, and other living organisms. The removal of toxic wastes involves technologies that are expensive, sometimes incomplete, and could represent health hazards. In addition, site restoration after contaminant removal encompasses time and technological resources. Phytoremediation, the use of plants alone or associated with microorganisms, represents a potentially cost-effective option in the long term management of contaminated sites. Various plants known as "hyperaccumulators" …
An Analysis Of Government Policy Impacts In The Ethanol And Sugar Markets, Hassan Marzoughi_Ardakani
An Analysis Of Government Policy Impacts In The Ethanol And Sugar Markets, Hassan Marzoughi_Ardakani
LSU Doctoral Dissertations
ABSTRACT This study determines the impact of U.S. government policies on U.S. ethanol market and its consequences for the U.S. corn, sugar, and HFCS markets. Using corn as the primary input in ethanol and HFCS production in the United States, along with the substitutability between sugar and HFCS, has linked the U.S. ethanol market to the U.S. HFCS, sugar, and corn markets. To address the problem, two sets of data, quarterly and annual data, were collected and a simultaneous econometric model was constructed. Estimated results show that the “2007 Energy Independence and Security Act” will increase the domestic corn price …
Essays On Environmental Issues Associated With The Diary Production Region In Louisiana, Larry Michael Hall
Essays On Environmental Issues Associated With The Diary Production Region In Louisiana, Larry Michael Hall
LSU Doctoral Dissertations
The Louisiana dairy production region (LDPR) is located in southeast Louisiana and includes five parishes (Tangipahoa, Washington, Livingston, St. Helena, and St. Tammany). It is home to approximately 90% of the state’s dairy industry and is a major contributor to nonpoint source pollution (NPS) in the area’s watershed through nitrogen, phosphorus, and sediment effluents. While point source (PS) effluents are easily identified and subject to federal and state regulations, NPS mitigation efforts must address uncertainties such as location of the NPS as well as stochastic parameters such as rainfall and its effect on nutrient and sediment flow. This dissertation presents …
Remittances, Foreign Direct Investment And Economic Growth In Latin America And The Caribbean, Pablo Antonio Garcia-Fuentes
Remittances, Foreign Direct Investment And Economic Growth In Latin America And The Caribbean, Pablo Antonio Garcia-Fuentes
LSU Doctoral Dissertations
Some of the literature about foreign direct investment (FDI) analyzes the location of FDI. It tries to identify the factors that affect FDI flows. On the association between remittances and growth, this is still an open discussion. This journal style dissertation is an attempt to investigate about the associations between remittances and FDI and growth in Latin America and the Caribbean (LAC). The first paper investigates the effect of remittances on U.S. FDI outflows to LAC. It uses data on 14 LAC countries for the period 1983-2003. The results show that market size is one of the main determinants of …
The Expansion And Diversification Of The Export Sector And Economic Growth: The Costa Rican Experience, Gustavo Filipe Canle Ferreira
The Expansion And Diversification Of The Export Sector And Economic Growth: The Costa Rican Experience, Gustavo Filipe Canle Ferreira
LSU Doctoral Dissertations
A large body of empirical literature has investigated the linkages between exports and output. Nevertheless, empirical evidence remains inconclusive and the topic remains open to discussion. Additionally, a number of studies have examined the positive effects that export diversification may have on economic growth. Within the Latin America region, Costa Rica has been lauded for its long democratic tradition, relative economic stability, and for evolving from being a small economy heavily reliant on exports of coffee and bananas, to become the largest software exporter per capita in Latin America. This study examined the impact that the expansion and diversification of …
The Economic Importance And Management Of Mercury Contamination In Pelagic Fisheries, Tina Marie Willson
The Economic Importance And Management Of Mercury Contamination In Pelagic Fisheries, Tina Marie Willson
LSU Doctoral Dissertations
The presence of mercury in the U.S. fish supply is a growing public health concern. At high levels, mercury can be harmful to humans and ecosystems, and represents a growing threat not only to public health, but also to the economic and ecological viability of many fisheries. This research examined the economic issues surrounding mercury contamination in fish, developed a population dynamics and bioeconomic model to investigate the problem, and compared a variety of management actions to reduce consumer exposure to contaminants. The dissertation begins with an overview of contamination issues in U.S. fisheries, including a review of the historical …
Three Essays On Environmental Issues Associated With Broiler Production In Louisiana, Nirmala Adhikari Devkota
Three Essays On Environmental Issues Associated With Broiler Production In Louisiana, Nirmala Adhikari Devkota
LSU Doctoral Dissertations
The increasing trends of integrated and concentrated broiler production results in a serious threat to environment through excessive litter production and lack of its proper disposal. Production concentration in limited area is a major source of surface as well as ground water pollution. Nonpoint source pollution from broiler litter applied on land remains a major concern in Louisiana and elsewhere in Southeastern USA. This study examines alternative approaches to reduce pollution originating from broiler production. First, I evaluate why some producers adopt BMP faster than others and what kind of factors affect the time to adoption decision. The duration model …
An Analysis Of The Impact Of The Eu Sugar Policy Reform On Acp Countries: A Quota Market Framework, Liliane Kiswendsida Zoungrana
An Analysis Of The Impact Of The Eu Sugar Policy Reform On Acp Countries: A Quota Market Framework, Liliane Kiswendsida Zoungrana
LSU Doctoral Dissertations
The pressures for reform within the World Trade Organization have led to the European Union (EU) reforming its sugar policy with a price cut phased from 2006 and scheduled to end in 2009. The reform will have an impact on the sugar protocol African Caribbean and Pacific (ACP) countries that have a preferential market access to the European Union with a protected price. This study investigates the effect of EU sugar policy reform has on these ACP sugar countries. First, it examines how the protocol countries’ sugar supply and demand determinants. While the determinants of supply in some countries performed …
Three Essays On The World Rice Market: A Structure, Conduct, And Performance Paradigm Approach, Hyunsoo Kang
Three Essays On The World Rice Market: A Structure, Conduct, And Performance Paradigm Approach, Hyunsoo Kang
LSU Doctoral Dissertations
In the past several decades, the international rice market has undergone major changes experiencing a strong expansion in traded volumes and in the volatility of rice prices. International rice prices are, furthermore, expected to remain at relatively high levels because of higher fertilizer and fuel prices, especially as stocks held by those exporters still allow unrestrained sales. With this instability in the world rice market, we need to consider the structure, conduct, and performance (S-C-P) of the world rice market. The main objective of this dissertation will be to examine the world rice market based on S-C-P methods. This dissertation …
Nerica, Kimaa, And The Sustainability Of Rice Farming In Magbainba Ndohahun Chiefdom, Sierre Leone: An Anthropological Perspective, Christopher M. Thomas
Nerica, Kimaa, And The Sustainability Of Rice Farming In Magbainba Ndohahun Chiefdom, Sierre Leone: An Anthropological Perspective, Christopher M. Thomas
Global Honors Theses
With the looming threat of a world food shortage, it has become increasingly important for developing African countries to strengthen their indigenous farming practices. This thesis examines the system of rice farming within Sierra Leone’s rural Magbainba Ndohahun Chiefdom, which the author visited in 2008 as part of a University of Washington interdisciplinary program on rice farming methods. Practices related to fallowing, fertilization, hired labor, and land tenure (kimaa) are discussed and placed within the context of long-term sustainability.
Biophysical Economic Analysis Of Nutrient And Sediment Management Practices In The Mississippi Alluvial Valley, Augustus Nyako Matekole
Biophysical Economic Analysis Of Nutrient And Sediment Management Practices In The Mississippi Alluvial Valley, Augustus Nyako Matekole
LSU Doctoral Dissertations
Conventional drainage systems and poorly drained soils tend to increase row crop agriculture nutrient and sediment effluent loads. Best management practices help reduce row crop production environmental pollution. This dissertation looked at nutrient and tillage management practices that could help farmers address future total maximum daily loads (TMDLs) for the Cabin-Teele sub-watershed, within the lower Mississippi River Basin. The dissertation had two objectives. The first objective was to examine the economic and environmental impact of tillage and nutrient management practices in reducing agricultural pollutants to meet TMDL requirements. Relative cost effectiveness of different tillage and nutrient management practices were analyzed …
Geology And Wine In Missouri: Spatial Analysis Of Terroir Using A Geographic Information System And Remote Sensing, Kathryn Nora Barnard
Geology And Wine In Missouri: Spatial Analysis Of Terroir Using A Geographic Information System And Remote Sensing, Kathryn Nora Barnard
MSU Graduate Theses
The concept of terroir, based on the French word meaning 'sense of place,' suggests that flavor and quality of wine is associated with certain physical characteristics of the earth as well as viticulture and viniculture practices. The physical characteristics of terroir include soil, geology, topography, and climate. Designated American Viticultural Areas (AVAs) are discrete appellations in the United States that have well-established and historic viticultural practices, but the relationship between terroir and AVA appellations is complex. Wineries are a growing industry in the United States and the use of a GIS and remote sensing has proved useful in many other …