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J. C. Penney: The Man, The Store And American Agriculture (Under Contract), David Kruger 2016 University of Wyoming

J. C. Penney: The Man, The Store And American Agriculture (Under Contract), David Kruger

David Delbert Kruger

No abstract provided.


Visual Methods For Collaborative Food System Work, K. Valentine Cadieux, Charles Levkoe, P. Mount, D. Szanto 2016 Hamline University

Visual Methods For Collaborative Food System Work, K. Valentine Cadieux, Charles Levkoe, P. Mount, D. Szanto

K. Valentine Cadieux

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Cover Crop Effect On Subsequent Wheat Yield In The Central Great Plains, David Nielsen, Drew Lyon, Robert Higgins, Gary Hergert, Johnathon Holman, Merle Vigil 2016 Washington State University

Cover Crop Effect On Subsequent Wheat Yield In The Central Great Plains, David Nielsen, Drew Lyon, Robert Higgins, Gary Hergert, Johnathon Holman, Merle Vigil

David C. Nielsen

Crop production systems in the water-limited environment of the semiarid central Great Plains may not have potential to profitably use cover crops because of lowered subsequent wheat (Triticum asestivum L.) yields following the cover crop. Mixtures have reportedly shown less yield-reducing effects on subsequent crops than single-species plantings. This study was conducted to determine winter wheat yields following both mixtures and single-species plantings of spring-planted cover crops. The study was conducted at Akron, CO, and Sidney, NE, during the 2012–2013 and 2013–2014 wheat growing seasons under both rainfed and irrigated conditions. Precipitation storage efficiency before wheat planting, wheat ...


A Brief History Of Corn: Looking Back To Move Forward, Jon Derek Pruitt 2016 University of Nebraska-Lincoln

A Brief History Of Corn: Looking Back To Move Forward, Jon Derek Pruitt

Doctoral Documents from Doctor of Plant Health Program

Maize was domesticated from teosinte in Mexico some 7,000 to 10,000 years ago and quickly spread through the Americas. It has become one of the most important crops at a local and global level. Two types, Northern Flint corn and Southern Dent corns provided the basis of the genetic background of modern maize hybrids. The development of hybrids, first double-cross and later single-cross hybrids, along with a transition to high input farming provided huge yield increases, which have continued to improve with improving technology.

Increase in maize production also caused a rise in Western corn Rootworm (Diabrotica virgifera ...


Impact Of Healthy Food Labels On Consumer Choice And Valuation, Mattingly Perlinger 2016 University of Nebraska-Lincoln

Impact Of Healthy Food Labels On Consumer Choice And Valuation, Mattingly Perlinger

Dissertations and Theses in Agricultural Economics

The obesity epidemic is prevalent across the entire United States, but minority communities are affected most of all. The Rosebud Indian Reservation in South Dakota is a minority community that has been particularly affected by the obesity epidemic, exhibiting higher rates of obesity and lower life expectancy than the rest of the country.

In this study we conducted a hypothetical choice experiment to test the effectiveness of three healthy food labels in increasing the likelihood of consumers choosing to purchase healthy products. We also calculated the consumer willingness to pay for each of these labels and examined differences in label ...


Managing Drought Stress In California Agricultural Systems, Gregory D. Brittain Jr. 2016 University of Nebraska-Lincoln

Managing Drought Stress In California Agricultural Systems, Gregory D. Brittain Jr.

Doctoral Documents from Doctor of Plant Health Program

California is currently facing a historic drought, and this has led many farmers in the state to severely cut back on irrigation. Optimal use of water for irrigation requires a comprehensive understanding of how plants respond physiologically to water stress (Chapter 1). By monitoring water requirements in crops and managing irrigation to meet those requirements, growers can significantly reduce water use (Chapter 2). This can be done through improving application efficiency of irrigation technology as well as increasing the water use efficiency of the crops themselves. Deficit irrigation practices can be used to manipulate the physiology of water use in ...


Automated Mini-Channel Platform For Studying Plant Root Environments, Kevin F. Kreis 2016 University of Nebraska-Lincoln

Automated Mini-Channel Platform For Studying Plant Root Environments, Kevin F. Kreis

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

Plants are crucial to our lives; they provide us with building materials, oxygen, and food. A season’s crop yield can be significantly affected by local environmental factors. Farming practices currently focus on using fertilizer, pesticides, monitoring water availability, and genetic modification of the plant to increase crop yield. Improving fundamental understanding of plant root interactions with their local soil environment, or rhizosphere, will help improve crop yield. Studying such interactions is challenging because roots are underground, making it difficult to observe interactions and to manipulate the local soil environment.

The goal of this thesis is to develop an automated ...


Improved Microplate Fluorometric Soil Enzyme Assay For Β-Glucosidase Detection, Emily C. Hoehn 2016 University of Nebraska-Lincoln

Improved Microplate Fluorometric Soil Enzyme Assay For Β-Glucosidase Detection, Emily C. Hoehn

Dissertations & Theses in Natural Resources

Soil microbes produce extracellular enzymes responsible for degrading complex organic compounds to release energy and nutrients. Measurement of soil enzymes can be considered an indicator of soil health and microbial community composition because of its sensitivity to agricultural and management practices. Fluorescence enzyme assays tend to be more sensitive than spectrophotometric (ie. colorimetric) assays and a 96-well plate has the potential capacity for high-throughput use. Development of a newly modified enzyme assay using fluorometric (4-methylumbelliferone), automated pipetting system and sonication, as well as a reduction in replicates allows for a higher sample throughput rate suitable for service laboratory use. The ...


Ecological Risks Of The Conventional Insecticide/Fungicide Seed Treatment Mixture Of Thiamethoxam And Mefenoxam In Soybean On Beneficial Insects, Carolina Camargo 2016 University of Nebraska-Lincoln

Ecological Risks Of The Conventional Insecticide/Fungicide Seed Treatment Mixture Of Thiamethoxam And Mefenoxam In Soybean On Beneficial Insects, Carolina Camargo

Dissertations and Student Research in Entomology

The impact of neonicotinoid seed treatments on beneficial insects has been a controversial topic during the last years. While neonicotinoids are usually used as mixtures with systemic fungicides, few studies have examined the impact of the mixtures on beneficial insects. Pesticide mixtures can have synergistic, additive, or antagonistic effects on the toxicity of neonicotinoids on non-target species.

Thiamethoxam with mefenoxam is the most used neonicotinoid insecticide/fungicide mixture applied to soybean. Based on the systemic nature of thiamethoxam and mefenoxam, residues of this insecticide/fungicide mixture can be present in soybean vegetative and floral tissue with potential impacts to beneficial ...


Squeaver, Cole Stonebrook, Matthew Frana, Samuel Tabor 2016 University of Tennessee - Knoxville

Squeaver, Cole Stonebrook, Matthew Frana, Samuel Tabor

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Overhanging limbs pose a threat to many homeowners with trees in their yard. If these limbs fall, property damage and personal injury are a major possibility. Currently the two methods used to cut and remove these limbs are hiring a tree service to use a boom truck to lift an arborist up to the limb or having a tree climber cut and lower the limb. Both methods are unsafe and expensive. Our design will be a tree-trimming device that can be rented from an equipment rental facility and operated by the homeowner. The machine will have the capability to extend ...


Biology, Gene Flow, And Management Of Glyphosate-Resistant Common Waterhemp (Amaranthus Rudis Sauer) In Nebraska, Debalin Sarangi 2016 University of Nebraska-Lincoln

Biology, Gene Flow, And Management Of Glyphosate-Resistant Common Waterhemp (Amaranthus Rudis Sauer) In Nebraska, Debalin Sarangi

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Common waterhemp is the most troublesome weed in the midwestern United States. Growers from Nebraska reported failure to control common waterhemp following sequential applications of glyphosate in glyphosate-tolerant corn and soybean, which led to moderate to severe yield loss; justifying the need to confirm resistance and study the biology and management of common waterhemp. The objectives of this research were: 1) to confirm the presence of glyphosate-resistant (GR) common waterhemp biotypes in Nebraska and to evaluate their sensitivity to herbicides belonging to alternative sites-of-action; 2) to evaluate the response of common waterhemp to water stress; 3) to quantify pollen-mediated gene ...


Fate And Transport Of Tylosin-Resistant Bacteria And Macrolide Resistance Genes In Artificially Drained Agricultural Fields Receiving Swine Manure, Elizabeth M. Luby, Thomas B. Moorman, Michelle L. Soupir 2016 Iowa State University

Fate And Transport Of Tylosin-Resistant Bacteria And Macrolide Resistance Genes In Artificially Drained Agricultural Fields Receiving Swine Manure, Elizabeth M. Luby, Thomas B. Moorman, Michelle L. Soupir

Agricultural and Biosystems Engineering Publications

Application of manure from swine treated with antibiotics introduces antibiotics and antibiotic resistance genes to soil with the potential for further movement in drainage water, which may contribute to the increase in antibiotic resistance in non-agricultural settings. We compared losses of antibiotic-resistant Enterococcus and macrolide-resistance (erm and msrA) genes in water draining from plots with or without swine manure application under chisel plow and no till conditions. Concentrations of ermB,ermC and ermF were all > 109 copies g− 1 in manure from tylosin-treated swine, and application of this manure resulted in short-term increases in the abundance of these genes ...


Effects Of Tillage And Poultry Manure Application Rates On Salmonella And Fecal Indicator Bacteria Concentrations In Tiles Draining Des Moines Lobe Soils, C. E. Hruby, M. L. Soupir, T. B. Moorman, M. Shelley, R. S. Kanwar 2016 Iowa State University

Effects Of Tillage And Poultry Manure Application Rates On Salmonella And Fecal Indicator Bacteria Concentrations In Tiles Draining Des Moines Lobe Soils, C. E. Hruby, M. L. Soupir, T. B. Moorman, M. Shelley, R. S. Kanwar

Agricultural and Biosystems Engineering Publications

Application of poultry manure (PM) to cropland as fertilizer is a common practice in artificially drained regions of the Upper Midwest United States. Tile-waters have the potential to contribute pathogenic bacteria to downstream waters. This 3-year study (2010–2012) was designed to evaluate the impacts of manure management and tillage practices on bacteria losses to drainage tiles under a wide range of field conditions. PM was applied annually in spring, prior to planting corn, at application rates ranging from 5 to 40 kg/ha to achieve target rates of 112 and 224 kg/ha nitrogen (PM1 and PM2). Control plots ...


Occupational Risks And Pregnancy And Infant Health Outcomes In Florida Farmworkers, Jennifer Runkle, Joan D. Flocks, Jeannie Economos, J. Antonio Tovar-Aguilar, Linda McCauley 2016 University of Florida Levin College of Law

Occupational Risks And Pregnancy And Infant Health Outcomes In Florida Farmworkers, Jennifer Runkle, Joan D. Flocks, Jeannie Economos, J. Antonio Tovar-Aguilar, Linda Mccauley

Joan D. Flocks

The agricultural industry has some of the highest incidence rates and numbers of occupational injuries and illnesses in the United States. Injuries and illnesses in agriculture result from accidents, falls, excessive heat, repetitive motion and adverse pesticide exposure. Women working in agriculture are exposed to the same hazards and risks as their male counterparts, but can face additional adverse impacts on their reproductive health. Yet, few occupational risk assessment studies have considered the reproductive health of female farmworkers. The objective of this community-based participatory research study was to conduct a retrospective, cross-sectional survey to collect information on workplace conditions and ...


Implementing A Community-Based Social Marketing Project To Improve Agricultural Worker Health, Joan D. Flocks, Leslie Clarke, Stan Albrecht, Carol Bryant, Paul Monaghan, Holly Baker 2016 University of Florida Levin College of Law

Implementing A Community-Based Social Marketing Project To Improve Agricultural Worker Health, Joan D. Flocks, Leslie Clarke, Stan Albrecht, Carol Bryant, Paul Monaghan, Holly Baker

Joan D. Flocks

The Together for Agricultural Safety project is a community-based social marketing project working to reduce the adverse health effects of pesticide exposure among fernery and nursery workers in Florida. In 3 years, the collaboration between university and community researchers has embodied many of the principles of community-based research while completing multiple stages of formative data collection required for a social marketing project. This hybrid approach to developing a health intervention for a minority community has been successful in its early stages because the community partners are organized, empowered, and motivated to execute research activities with the assistance of academic partners ...


Pesticide Policy And Farmworker Health, Joan D. Flocks 2016 University of Florida Levin College of Law

Pesticide Policy And Farmworker Health, Joan D. Flocks

Joan D. Flocks

Although data on the carcinogenicity of agricultural pesticides are still being generated and are thus incomplete, research such as the Agricultural Health Study indicates that populations with increased, regular exposure to pesticides have high rates of a variety of cancers (National Institutes of Health & Environmental Protection Agency 2008). Policies that regulate toxins such as pesticides are envisioned by the public to be empirical and objective, but toxins are socially produced and their regulation is just as often based on political and economic factors as it is on science (Luke 2000). This does not bode well for farm- workers who are ...


Design Of A Mobile Shade And Cooling Structure For Grazing Dairy Herds, William Barbour, Ellen Moore, Jay McMillan 2016 University of Tennessee, Knoxville

Design Of A Mobile Shade And Cooling Structure For Grazing Dairy Herds, William Barbour, Ellen Moore, Jay Mcmillan

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

The U.S. organic dairy industry has experienced significant growth in recent years: over 10% growth annually since 2009 and 14.5% from 2010 to 2011; total market share is approximately 5% in the United States. The USDA places certain requirements on diary products that are certified organic, some of which are aimed at grazing practices. One challenge farmers must overcome to comply is keeping the cows in optimum conditions in a free-range grazing scenario; poor conditions such as excessive heat can decrease milk production and pose an economic burden on the dairy. The proposed system intends to control environmental ...


Land Management Effects On Selected Properties Of Silt Loam Soil In Tennessee, Usa, Kang-Chi Wu 2016 Murray State University

Land Management Effects On Selected Properties Of Silt Loam Soil In Tennessee, Usa, Kang-Chi Wu

Scholars Week

Land management practices greatly influence soil properties. However, the effects are different among soil properties. This study was conducted to determine the impact of various common land management systems on selected soil properties, include organicmatter content, the level of acidity, soil color and macro-aggregate content. During fall of 2015, soil samples were collected fromtopsoiland subsoil of silt loamatStewart County, TN. Soil samples were taken from six different land management systems, such as 30 years of tobacco field, 30 years of hardwood forest, 20 years of vegetable garden, 20 years of pasture, 35 years of lawn, and 6 years of corn ...


Cold Temperatures And Burndown Herbicides, Robert G. Hartzler 2016 Iowa State University

Cold Temperatures And Burndown Herbicides, Robert G. Hartzler

Integrated Crop Management News

The weather forecast appears to be favorable for field activities so people will be anxious to get into the field. A concern for many will be the effect of the widespread freeze on the performance of burndown herbicides. Unfortunately, there is no simple blanket statement that can be made since the plant response will vary depending on weed species, weed size, and the herbicides used.


Bioenergy Corp Production And Combustion In Agriculture, Vaughn T. Reed, Caleb Brannon 2016 Murray State University

Bioenergy Corp Production And Combustion In Agriculture, Vaughn T. Reed, Caleb Brannon

Scholars Week

Biomass, vegetative waste from energy crops such as switch grass and sorghum, is a key input for transforming the face of energy and agriculture for the future of Kentucky, the nation, and the world. The purpose of this experiment at Murray State University using the Bio-Burner 500 unit—BB-500— from L.E.I products in Madisonville, KY, was to evaluate the efficiency of a combustion-based energy converter and boiler using various biomass materials, along with providing some heat to The Equine Center at Murray State University. Loose forms of switch grass, tobacco stalks, miscanthus, equine waste, wood shavings and mixtures ...


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