Agriculture Commons^™

Differences In Carbon Dioxide Evolution From Samples Of Shelled Corn Subjected To Various Storage Treatments, Cininta Alp Pertiwi

Open Access Theses

Shelled corn was collected from two sources - commercial grain elevators and corn harvested from Purdue University farms and then frozen until tested. Using a carbon dioxide (CO₂) test kit manufactured by Woods End Laboratories, CO₂ evolution measurements were conducted on shelled corn from both sources, after the samples were re-wetted to approximately 21% moisture content, placed in a 473 ml glass jar, and incubated at room temperature for 72 hours. The CO₂ test kit uses a gel that changes color in response to a change in the level of CO₂ in the surrounding air. …

Supplemental, End-Of-Day, And Sole-Source Lighting From Light-Emitting Diodes Influences Growth, Morphology, And Quality Of Annual Bedding Plant Seedlings, Wesley C. Randall

Open Access Theses

Annual bedding plants make up the largest sector of the U.S. floriculture industry. High-quality annual bedding plant seedlings are compact, fully rooted transplants with a large stem caliper and high root dry mass. However, production usually occurs in late winter or early spring when the daily light integral (DLI) is as low as 1 to 5 mol·m^–2·d ^–1 in northern latitudes. Therefore, supplemental lighting (SL) is often used to increase the DLI to a recommended 10 to 12 mol·m ^–2·d^–1. The objectives of this study were to: 1) quantify the effects of SL from three …

Abcb11 Functions With B1 And B19 To Regulate Rootward Auxin Transport, Jesica Elyse Reemmer

Open Access Theses

Auxin transport is essential for the architecture and development of erect plants. In a network of transporters directing auxin flows, ATP-Binding Cassette (ABC) transporters are a ubiquitous family of proteins that actively transport important substrates, including auxins, across the plasma membrane. ABCB1 and ABCB19 have been shown to account for the majority of rootward auxin transport, but residual fluxes to the root tip in Arabidopsis b1b19 double mutants implies the involvement of at least one additional auxin transporter in this process. Of specific interest, the severe dwarfism seen in abcb1abcb19 is strikingly reminiscent of that seen in mutants defective in …

The Effects Of Radar On Avian Behavior: Implications For Wildlife Management At Airports, Eleanor R. Sheridan

Open Access Theses

Airports are areas with a high availability of resources for wildlife to forage, breed, and roost. Airports also have different types of radars to assist with air traffic control as well as tracking of wildlife that could become a risk for aircraft. The effect of radar electromagnetic radiation on wildlife behavior is not well understood. The goal of this study was to determine if bird behavior is affected by radar in two contexts: static radar (e.g., surveillance radar) and approaching radar (e.g., aircraft weather radar). We used brown-headed cowbirds as a model species. In the static radar context, we performed …

Ems Induced Mutations In Dhurrin Metabolism And Their Impacts On Sorghum Growth And Development, Jenae Lavon Skelton

Open Access Theses

Sorghum is the fifth most important grain crop in the world. It is a staple food, feed, and silage crop in many developing countries in the semi-arid tropics. One factor that can impact sorghum forage quality is dhurrin content. Dhurrin is a cyanogenic glucoside naturally produced in the plant. When tissues containing dhurrin are crushed, hydrogen cyanide (HCN) is released during dhurrin decomposition. HCN is toxic to humans and livestock. While there is natural genetic diversity for the concentration of dhurrin within sorghum lines, there have been no naturally occurring dhurrin-free genotypes identified to date. ^ We have identified ethyl …

Fact Or Fiction: Random Mating In Field Populations Of Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Emerging On Bt And Refuge Corn Plants, Steven Joel Smith

Open Access Theses

The western corn rootworm, or WCR, (Diabrotica virgifera virgifera LeConte) is the most significant pest of field corn (Zea mays) in the United States, and has recently expanded its range into Europe. Since 2004, hybrid corn containing Bt toxins targeting the corn rootworm complex have been heavily adopted and are now the primary control measure for this pest in North American corn production. ^ The evolution of resistance is an ongoing concern, and to ensure Bt products will retain their usefulness, insect resistance management (IRM) tactics using various refuge structures have been adopted. One of the key …

The Effectiveness Of Virtual And On-Site Dairy Farm Field Trips To Increase Student Knowledge In Science, Social Studies, And Health And Wellness Standards, Abby M. Sweet

Open Access Theses

The integration of agriculture into the curriculum can be difficult for educators when materials and resources are not aligned with state learning standards. However, online educational tools, such as virtual field trips that are aligned with state learning standards, can allow for educators to bring the experience of a field trip to the classroom, as well as complement curriculum in the classroom. Virtual field trips also assist with removing many barriers that prevent educators from taking their students on an on-site field trip. ^ This study sought to describe the effectiveness of a virtual and on-site dairy farm field trip …

Effectiveness Of Field Days On Promoting The Adoption Of Recommended Improved Maize Varieties By Small Holder Farmers In Lilongwe District, Malawi, Yakosa Charity Zgawa Tegha

Open Access Theses

The study described the contribution of field days to promoting the adoption of improved maize varieties by small holder farmers of Chitsime and Mpingu Extension Planning Areas (EPAs) in Lilongwe District, Malawi. Sixty farmers from two EPAs where the field days had been conducted were randomly selected. Data were collected through personal interviews because literacy was a problem among farmers. The results of the study showed that 31 (51.7%) of the farmers interviewed were female. Use of other methods such as radio, mobile van, leaflets, posters, village meetings and messages sent to farmers’ cellphones helped to popularize the improved maize …

An Analysis Of Marketing Margins In The Us Beef Industry, John A. Tobin

Open Access Theses

The US beef industry has undergone significant structural changes in the last 30 years at the wholesale and retail levels. Meanwhile producer prices have failed to keep pace with increases in the price of beef received by wholesalers and retailers, resulting in concerns being raised about market power being exercised in the beef industry by stakeholders. ^ This study uses marketing margins to determine what factors affect margins, test for differences among different procurement methods of purchasing cattle, and test for differences among different cuts of beef. This paper extends previous research providing more detail regarding the factors that may …

Furniture Design And Product Development Principles Considering End-Of-Life Options And Design For Environment Strategies, Mesut Uysal

Open Access Theses

During last decades, environmental issues come into prominence and some governmental or organizational regulations are legislated to reduce environmental impacts of products within their life cycle. At the same time, costumers consider not only price, quality, branding, uniqueness, availability but also environmental impact, safety, and overall sustainability of products they select. Therefore, producers are addressing environmental impact of products they are producing and also making changes to their production process. This project is addressing End-of-Life (EoL) Options of wooden furniture. ^ Although wood is eco-friendly and natural material, its technological process, use and disposal might have ecological problem and challenge. …

Field To Flight: A Techno-Economic Analysis Of Stover To Aviation Biofuels Supply Chain, Amanda C. Bittner

Open Access Theses

Greenhouse gas emissions have been a growing concern. The transportation sector contributes to one-third of GHG emissions in the United States from fossil fuel burning. The Renewable Fuel Standard set a requirement for 16 billion gallons (ethanol equivalent) of cellulosic biofuels to be used in the market. Aviation biofuels can help to meet both of these problems as well as improve U.S. energy security.

Investment in the biofuel industry carries a lot of risk. The biofuel industry is run by the private sector, but can be incentivized by government. Cellulosic biofuels carry even more risk than first generation biofuels, because …

Price Impacts Of Increased Peruvian Table Grape Supply, Jacob W. Iest

Open Access Theses

In the last decade, Peru has begun to structure its economy and complete infrastructure projects to promote agricultural export growth. Bolstered by the signing of the Peru Trade Promotion Agreement (PTPA) with the U.S., table grape production has increased significantly since 2006. Peru has a climatic advantage for a quality harvest from November to March, which overlaps the end of the U.S. growing season. With this supply increase expected to continue, U.S. producers and marketers question the effect Peru will have on "late-season" table grape prices in North America.

This thesis is a study of the effects of an increase …

Essays On Productivity Growth In Agriculture, Uris Lantz Caldo Baldos

Open Access Dissertations

This dissertation aims to explore the current trends in agricultural productivity and analyse its impact on the global farm and food system. Chapter 2 in this dissertation looks at the current trends in agricultural productivity in India—one most of the populous country in the world. In this chapter, productivity trends in Indian agriculture are examined by looking at changes in Total Factor Productivity—a measure which takes into account all farm outputs and inputs. Estimates in this chapter suggest that TFP growth for the 10-year period—between 1999-2000 and 2009-2010—steadily grew at the national level. Looking at the 5-year estimates, TFP growth …

Nebline, July 2014

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Feature: 4-H Table Setting Contest is a Fun Way to Learn Nutrition, Setting a Table, Presenting and More!

Food & Health

Family Living

Farm & Acreage

Home & Family Living

Horticulture

Pests & Wildlife

4-H & Youth

Extension Calendar

and other extension news and events

The Ecological Impact Of Casitas On Caribbean Spiny Lobster (Panulirus Argus) Populations In The Florida Keys, Fl, (Usa), Benjamin C. Gutzler

Biological Sciences Theses & Dissertations

Casitas are artificial structures placed on the seabed by fishermen to aggregate Caribbean spiny lobsters (Panulirus argus) for ease of capture. Some researchers suggest that they may also enhance lobster populations in shelter-limited environments. Conversely, aggregation of lobsters within casitas may be detrimental to the population if the nutritional condition or mortality of lobsters is poorer in casitas than in natural shelters. Small juvenile lobsters may be at particular risk because their foraging range is smaller and they are more readily preyed upon than larger lobsters. If so, then casitas placed in lobster nurseries may function as "ecological traps"; wherein …

Growing South Dakota (Summer 2014), College Of Agriculture &. Biological Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

[Page] 2 Extending Knowledge, Changing Lives: SDSU Extension Marks 100-Year Milestone
[Page] 5 Preparing for SDSU Extension’s Future
[Page] 5 SDSU College of Agriculture & Biological Sciences Administrative Team [Page] 6 Summer College News
[Page] 7 Profiles In Leadership: Joseph Cassady; Local Leadership Important For Ag’s Future
[Page] 8 Advancing Agriculture: SDSU Precision Ag Program Evolves, Expands [Page] 9 On The Front Line: ADRDL Leads Important Effort For Animal Health Diagnostics
[Page] 10 4-H Philanthropy: Supporters Continue Campaign For New 4-H Exhibit Hall [Page] 11 Growing Global Citizens: AgBio Courses Offer International Learning Opportunities
[Page] 12 Guidance For Gardeners: Several …

Affluent Populations And Their Effect On Biological Diversity Through The Consumption Of Meat, Electronics, And Motor Vehicles, Melody Flores

Honors College Theses

The human has caused a far greater impact on the planet's biodiversity than any other species in existence, due to the impact of population, afflluence, and technology. This thesis will argue the importance of biological diversity and how affluent populations are reducing biodiversity through the consumption of meat, electronics, and motor vehicles. Aldo Leopold's "The Land Ethic" and Herman Daly's "The Impossibility Theorem", among others, create a rubric evaluating human activities and provide alternative views on economic impossibilities. Consumption is reviewed from an ecocentric perspective, a holistic outlook placing emphasis on the ecosystem. The reader will become cognizant of their …

Functional Genomics Of Maize Endosperm Maturation And Protein Quality, Lingling Yuan

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Maize is one of the most important cereal crops and widely cultivated throughout the world. The study on maize kernel development including protein quality improvement is essential for removing dietary protein deficiency because of the lack of essential amino acids, especially lysine and tryptophan, in maize kernel. Quality Protein Maize (QPM) is a hard kernel variant of the high-lysine mutant, opaque-2. We created opaque QPM variants to identify opaque-2 modifier genes and to investigate deletion mutagenesis combined with Illumina sequencing as a maize functional genomics tool. A K0326Y-QPM deletion mutant, line 107, was null for the 27- and 50-kD …

Characterization Of Water-Solid Interactions In Crystalline Ingredients And Development Of Deliquescence Measurement Recommendations, Matthew C. Allan

Open Access Theses

There are five major mechanisms of water-solid interactions. The primary focus of this thesis was on two of these: deliquescence and hydrate formation. Many crystalline food ingredients are deliquescent compounds (e.g., NaCl, sucrose, and ascorbic acid) and some are both deliquescent and hydrate formers (e.g., glucose, thiamine HCl, citric acid). Deliquescence is the first order phase transformation of a crystalline solid to a solution above a critical relative humidity (RH) known as the deliquescence point (RH0). A crystalline hydrate is a pseudo-polymorph in which water is incorporated into the crystal structure, altering the molecular formula and the physical properties.^ To …

Jeffrey, Jonathan David, B. 1960 (Sc 2847), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2847. Historic Farms Certificate Application, Kentucky Historic Resources Abbreviated Survey Form and supporting material, prepared by Jonathan D. Jeffrey to designate the Paschal Howell Farm, Warren County, Kentucky, a centennial farm. This designation is bestowed on farms that have been owned by the same family for one hundred years or more. Includes compact disc with 13 photographs.