Agriculture Commons^™

Integration Of Hydrogeophysical Datasets For Improved Water Resource Management In Irrigated Systems, Catherine E. Finkenbiner

School of Natural Resources: Dissertations, Theses, and Student Research

Water scarcity is predicted to be the major limitation to increasing agronomic outputs to meet future food and fiber demands. With the agricultural sector accounting for 80 – 90% of all consumptive water use and an average water use efficiency (WUE) of less than 45%, major advances must be made in irrigation water management. Precision agriculture, specifically variable-rate irrigation (VRI) and variable-speed irrigation (VSI) systems, offers the technologies to address and manage for infield variability and incorporate that into management decisions. The major limitation to implementing this technology often lies in the management of spatial datasets and the development of …

Capture Theory & State Regulation Of Animal Cruelty, Kyla Henderson

Political Science Theses and Capstones

In this thesis I theorize that regulatory capture impacts animal cruelty laws in several different ways. Capture theory is the process by which regulatory agencies eventually come to be dominated by the industries they were charged with regulating. Regulatory capture happens when a regulatory agency, formed to act in the public’s interest, eventually acts in ways that benefit the industry it is supposed to be regulating, rather than the public. Animal cruelty regulations are an important factor in the way that everyday products are produced. Capture theory affecting animal cruelty is an important look at the growing concern with animal …

Aquaponics: Redefining Education For Our Youth, Joshua Peal

Senior Theses

In America, we are seeing a lack of effectiveness with our K-12 schools. This costs the school districts and taxpayers money with very little return guaranteeing an ongoing investment into adulthood. Students finishing high school have very little if any applied learning and technical skills, and still need to accomplish at least four years of college or a trade school to be able to compete, even for a job not requiring a degree. Of those high school graduates, half and growing do not feel that they are prepared for college. Students also have little understanding of, or experience with, the …

Assessment Of The Arkansas Horse 4-H Program: Perspectives From Multiple Stakeholders, Fawn Lee Kurtzo

Graduate Theses and Dissertations

Assessment of the Arkansas horse 4-H program utilized stakeholders’ perceptions to describe inputs, outcomes, preferences and impacts provided by the Arkansas Cooperative Extension Service. Stakeholders’ perceptions were captured through three studies. Studies included the following: a pre- and post-test evaluation of the 2016 summer horse camp, purposive interviews with county agents (n = 6), volunteer leaders (n = 4), and parents (n = 4) of horse 4-H clubs, and a statewide survey provided to Extension staff (n =26) and volunteer leaders (n = 28) affiliated with horse 4-H clubs.

The 2016 summer camp evaluation found the goals to improve horsemanship, …

International Diffusion Of Food Safety Standards: The Role Of Domestic Certifiers And International Trade, Rezgar Mohammed, Yuqing Zheng

Agricultural Economics Faculty Publications

We examined the cross-national adoption of six major private food safety standards, focusing on the role of certifiers and international trade. Results show that the number of certification bodies existing in the domestic country, food exports, and the proportion of food exports to North America had positive effects on a country's adoption of food safety standards. Distance leads to product differentiation for the standards and therefore disadvantages developing countries in Africa and Asia for adopting the standards, which are all based in the United States or Europe. Providing these countries with better access to certifiers can alleviate this geographic disadvantage.

Multifunctionality Of Cover Crops On Organic Vegetable Farms In South Texas, Savannah M. Rugg

Theses and Dissertations

Situated in deep South Texas, the Lower Rio Grande Valley (LRGV) is considered one the most productive agricultural regions in the southern US. With the highest concentration of organic farms in the state (Hidalgo county), finding management practices that comply with organic certification is increasingly pertinent. Cover cropping can serve multiple functions in an agroecosystem such as: suppressing weeds, increasing soil organic matter (SOM), increasing soil nitrates, and enhancing soil biodiversity. The four cover crops (lablab, sunn hemp, sudangrass, and pearl millet) were assessed to see their potential to increase soil nitrogen, to increase soil organic matter, and to suppress …

Adaptive Strategies In A Slow-Motion Apocalypse, Allana Ross

Graduate School of Art Theses

Nature is a construct inherited from Enlightenment thought. Our culture of nature—the way we construct, teach, communicate and perpetuate our concept of nature—has furthered the false dichotomy of an untamed nature versus a resource-consuming culture. This dualistic thinking has facilitated the current environmental crisis. We thus need a new culture of nature and a system of re-education that enables a symbiotic relationship between ourselves and our environment. A re-negotiation of this relationship is imperative to our continued survival on this planet; thus a reformation of the culture of nature can be viewed as an adaptive strategy. Systems-focused ecological art practice …

Growth And Poverty Traps: Examples From Literature, Danielle Chaloux

Honors Scholar Theses

The writings of Charles Dickens, Emile Zola, Knut Hamsun, and Laura Ingalls Wilder capture humanity on the page. The characters in the works of these authors are confronted by realistic or autobiographical situations and make choices based on history, personal preferences, societal pressures, and economic constraints, just as real-life individuals do. They can thus serve as data for illustrating the implications of economic models, specifically poverty traps. To do so, I will draw from Great Expectations (1861) by Charles Dickens, The Fat and the Thin (1873) by Emile Zola, Hunger (1890) by Knut Hamsun, and The First Four Years (1971) …

Genetic Variation In Two Economically Important Arthropod Vectors Of Citrus Diseases, Alejandra Fuentes

Theses and Dissertations

Arthropod vectors are agriculturally and ecologically important because they transmit numerous plant pathogens. Commonly, control strategies for vector-borne plant pathogens focus on suppression of vector populations. Genetic variation studies in pest populations provide useful information for biological control, understanding pesticide resistance, and inferring global movement patterns. In chapter I, genetic variation of worldwide populations of Diaphorina citri, the vector of Citrus greening disease, was examined to assess potential sites of origin of invasive populations. The results showed population structure at regional levels, suggesting limited gene flow and revealing patterns of invasion. In chapter II, I explored the community of …

Decision Support Software For Palmer Amaranth Weed Control, Karen Renee Lindsay

Graduate Theses and Dissertations

Herbicide-resistant Palmer amaranth [Amaranthus palmeri (S.) Wats.] has been identified as one of the most troublesome weeds, specifically for corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] producers in the southern United States. The use of herbicide technology remains the most widely used method of weed control, despite the evolution of herbicide-resistant Palmer amaranth. Therefore, a need currently exists for research and extension education to encourage the adoption of Integrated Pest Management (IPM) to address the problem of herbicide-resistant Palmer amaranth in the southern United States. By equipping crop producers, educators, and weed management …

Economic Assessment Of A Highly Pathogenic Avian Influenza Outbreak In Washington And Benton Counties In Arkansas, Antonio Beitia

Graduate Theses and Dissertations

Highly Pathogenic Avian Influenza (HPAI) presents a substantial economic risk to the poultry industry. Domesticated fowl contract HPAI initially through exposure, direct or indirect with migratory waterfowl and outbreaks can result in significant economic losses to growers and the poultry industry at large. A HPAI outbreak occurred in Minnesota and Iowa and spread across over 13 other states in 2014 and 2015. This caused an estimated $1.6 billion in losses (CDC, 2016) and led to shortages of eggs and turkeys together with elevated prices (Anni et al. 2005). Even small outbreaks of HPAI inflict substantial damages as USDA-APHIS guidelines necessitate …

Efficiency And Competitiveness Of Kosovo Raspberry Producers, Rina Vuciterna

Graduate Theses and Dissertations

Raspberry production is a growing industry in Kosovo. In addition to private investments, this growth has been supported by grants, subsidies, and direct investment from international donor organizations and governmental institutions. At present, most of the commercially produced raspberries in Kosovo are produced on small farms, harvested by farmers and packed manually by collection centers, and then sold in frozen form for the export market. The long-term viability and continued growth of raspberry production in Kosovo depends on the industry being able to compete in export markets and hold its own against production regions in Poland, Serbia, and Russia. Our …

The Bovine Rumen Microbiome Revealed By Different Fractions Of Rumen Contents, Ashlee L. Breakstone

Animal Science Undergraduate Honors Theses

The bovine rumen microbiota is very important in terms of animal functionality and digestion. The fermentative capability of the rumen provides means for the digestion of complex plant material that is indigestible by humans. The rumen is the working ground for millions of microorganisms, primarily bacteria, to digest and ferment feed into volatile fatty acids and bacterial protein for the animal’s energy and protein needs, respectively. Of significant importance is the rumen microbiomes ability to conform to certain factors such as genetics, feed, or geographic location. These changes can have a direct measure on animal growth, health, and performance. The …

Estimates Of Corn Residue Quality, Tasha M. King

Department of Animal Science: Dissertations, Theses, and Student Research

Two experiments were conducted to determine the effect of corn residue harvest method on animal performance and diet digestibility. Corn residue harvest methods used in these experiments were low-stem, high-stem, and conventional. Steers had greater ADG when fed low-stem in a growing diet compared to high-stem and conventional residues. Addition of supplemental RUP to corn-residue based diets resulted in greater ADG and G:F in steers. Digestibility of DM, OM, and NDF were greatest in lambs fed diets containing low-stem residue. Low-stem residue had greater digestible energy (DE) compared to high-stem and conventional, which did not differ.

Lastly, a study was …

Effects Of Energy Restriction During Gilt Development On Milk Nutrient Profile, Progeny Biomarkers, And Growth Performance, Shana Marie Barnett

Department of Animal Science: Dissertations, Theses, and Student Research

Two experiments were conducted at separate times to evaluate the effects of sow dietary treatment on piglet growth performance. One experiment solely focused on the growth performance of parity 1 piglets from gilt batches 5 through 13. The other experiment focused on growth performance of piglets from batch 14, parity 1, as well as, analysis of growth biomarkers, GLP-2 and Insulin. Milk samples from sows of each dietary treatment were collected and analyzed for oligosaccharide composition, nutrient composition, and insulin levels.

The first experiment utilized 733 sows that were fed either a restricted (RESTR) of ad libitum (ADLIB) diet during …

Effects Of Egg Yolk On Piglet Growth Performance, Circulating Immunoglobulins, Biomarkers Of Intestinal Integrity, And Microbial Community, Kelly C. Moore

Department of Animal Science: Dissertations, Theses, and Student Research

A total of 72 crossbred pigs weaned at 24 days were assigned to a completely randomized design (CRD) arrangement of treatments to determine the effects of egg yolk on a nursery piglet’s growth performance, circulating immunoglobulins, biomarkers of intestinal integrity, and microbial community. Pigs were provided with spray-dried plasma (SDP), spray-dried egg yolk (SDEY), or a control diet. During Phase III, ADG was affected by treatment (P < 0.10). Pigs consuming the egg yolk diet had greater (P < 0.05) ADG vs. the plasma group for Phase III. Circulating immunoglobulins (IgA and IgG) were not affected by dietary treatment. C-reactive protein (CRP) and haptoglobin (Hp) concentrations remained constant during the experiment. Treatment did effect Glugacon like peptide-2 (GLP-2) concentration (P < 0.01) where pigs fed egg yolk had the greatest concentration. Microbial OTUs were similar among treatments (P > 0.8), but there were changes over time; from d 0 to Phase I and II there was an increase in diversity (P < 0.01) followed by a decrease in …

Sensor Placement Effects Acceleration Data For Monitoring Equine Activity, Carol J. Thompson

Department of Animal Science: Dissertations, Theses, and Student Research

Monitoring horse activity continually is a valuable aid for horse caretakers to provide recommendations to help users meet their goals and improve overall horse health. Activity trackers commonly use an accelerometer to determine steps and exercise intensity. The activity level capabilities using a 3-axis accelerometer were tested in three locations on the horse. The objectives were to determine which location results in the most accurate step count, threshold values for each gait and to identify correlations between the thresholds and horse characteristics. Twenty-four horses wore three identical smartphone accelerometers, one in each of three locations: right side of the head …

Rice Value Chain Development And Policy Sequencing In Southern Africa, Sandratra M. Razafinjoelina

Graduate Theses and Dissertations

In the wake of the 2008 food crisis, net food importing countries questioned the reliance on the volatile world market to meet their food demand. Consequently, the necessity to be selfsufficient returned to the forefront of national priorities. In Africa, the Coalition for African Rice Development (CARD) initiative was initiated and aimed to double rice production in the continent by 2018, with the eventual goal of achieving self-sufficiency in rice production. To attain this goal, each of the 23 CARD member countries drafted a comprehensive value chain upgrading strategy called the National Rice Development Strategy (NRDS). This study intends to …

Refusing To Be Dispossessed: African American Land Retention In The Us South From Reconstruction To World War Ii, Camille Goldmon

Graduate Theses and Dissertations

African Americans in the South were tied to the land during slavery and after emancipation. Many felt that land ownership was the key to freedom. For decades, black farmers strove for land ownership, in many cases falling prey to sharecropping and tenancy agreements in the meantime. Despite this drive toward independent farming, however, since 1920, there has been a steady decline in the number of black farm owners. This trend is especially prevalent in the Southern United States. The black farm owners who persevered through periods of economic, social, and political turmoil were able to, for varying reasons, navigate those …

Intentional Mentoring Through 4-H: The Role Of 4-H In A Successful Mentoring Program Between Youth And Adults, Emily Ann Shepperd

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

4-H Youth and Families with Promise (4-H YFP) is a one to one youth mentoring program that aims to help youth obtain skills that will help them to be successful. The purpose of this research was to determine if any positive outcomes were shown of youth participating in 4-H YFP. Positive outcomes were identified as peer social competence, greater ability to make positive choices, the development of effective communication skills, building connections, and contributing to the community. Results show that these outcomes positively increased among youth participants in the 4-H YFP program- but the changes were too small to be …