Agriculture Commons^™

The Growing Threat Of Agroterrorism And Strategies For Agricultural Defense, Alyssa Forrest

Senior Honors Theses

Due to the dynamic nature of human conflict, non-traditional terror tactics have evolved to undermine the socioeconomic stability of targeted societies. Considering the landscape in which terrorists operate, emphasis on more subversive methods of biological terror have become prominent in recent decades. Agroterrorism, or the use of plant pathogens to infect a nation’s cultivated crops, is an emerging topic due to its threat to global food security and economic stability. Although emergency preparedness objectives have been enacted at national, state, and even local levels, preemptive measures can no longer remain the sole responsibility of intelligence and law enforcement agencies. The …

Examining The Effects Of Time On Antibiotic Resistance Within Prairie Restorations, Haley Ritsema

Honors Theses

Widespread antibiotic use in agriculture spreads antibiotic resistance (AR) genes throughout the ecosystem and can impact bacterial community composition and function. Restoring agricultural fields back to their native prairies has been shown to remediate other damaging effects of agriculture, and have the potential to remediate AR from the soil as well. In this study, our first aim was to determine if soil bacterial communities return to pre-agricultural conditions over time following restoration to native plant communities. We did this by assessing the soil characteristics, extracellular enzyme activities, bacterial community composition, and functional metagenomics across a chronosequence of seven restored prairies, …

Long-Term Rotation Diversity And Nitrogen Effects On Soil Organic Carbon And Nitrogen Stocks, Marty R. Schmer, Virginia L. Jin, Brian J. Wienhold, Sophia M. Becker, Gary E. Varvel

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Understanding the impacts of long-term fertilizer management and rotation diversity on soil C and N is needed under a changing climate. The objective of this study was to evaluate the effects of N fertilizer level and crop rotation diversity on soil organic carbon (SOC) and soil N stocks from a 34-yr study located in eastern Nebraska. Seven crop rotations (three continuous cropping systems; two 2-yr crop rotations; and two 4-yr crop rotations) and three N levels were compared. Soil samples were taken to a depth of 150 cm. Differences in SOC stocks were largely confined to the 0- to 7.5-cm …

Covid-19, Farm Survival And Decision Making, Cory Walters, Jessica Groskopf, Richard Preston

Cornhusker Economics

COVID-19 is causing us to experience events that have always been possible, just not yet observed. For farmers these events may have a big negative financial impact, or they may not. The impact on each individual farm has to do with how that individual farm has prepared for rare financially devastating events. Preparing for unseen events represents a logical approach. We call this approach stress testing. Just because you have not seen an event, it does not mean it does not exist. Or said another way, absence of evidence is not evidence of absence. In this article, we discuss how …

Engaging Educators Through A Drone Curriculum Project To Deliver 21st Century Fanh Skills To Grades 4-12 Students, Denise Stewardson

Funded Research Records

No abstract provided.

Management Effects On Soil Quality Of The Geary Soil Series In Thayer County, Nebraska, Aime Nishimwe

UCARE: Research Products

The CGIAR reports that around 40% of global crop yield variability is explained by climate. While global food consumption is expected to soar in 2050, the impact of climate change accounts for approximately 5% decrease in crop productivity. FAO estimates a 60% increase in global food demand by 2050, with global population reaching 9.8 billions. Sustainable soil management was also noted to boost agricultural food production by 58%. The evaluation of the impact of different management practices on dynamic soil properties was conducted on Geary silty clay loam, 3 to 7 %, eroded soils, which are mainly used for crop …

Pumpkin Cultivar Evaluation For Eastern Minnesota 2019, Annie Klodd, Rod Elmstrand

Midwest Vegetable Trial Reports

This trial compared the performance of 32 pumpkin varieties, including new cultivars and cultivars commonly grown in Minnesota, under minimal-till conditions in east-central Minnesota. Yield, average fruit weight, fruit weight variability, tons per acre, fruit per acre, and handle length were evaluated and reported for each variety.

Mechanisms Of Silencing Suppression By A Polerovirus P0 Protein, Natalie Holste, Hernan Garcia-Ruiz

School of Biological Sciences: Presentations

Maize lethal necrosis is an intense viral disease spreading across sub-Saharan Africa. Maize is the staple crop grown in sub-Saharan Africa, but most crops infected with maize lethal necrosis will not survive to harvest. This causes immense economic hardship and starvation within the population. Maize lethal necrosis consists of a combination of two viruses, Maize chlorotic mottle virus (MCMV) and a virus from the genus potyvirus. In a recent study, a Maize yellow dwarf virus-RMV (MYDV-RMV)-like polerovirus, was repeatedly detected in plants with maize lethal necrosis. Poleroviruses have a silencing suppressor, P0 protein, and the mechanism of suppression is poorly …

Social Media Use Among 4-H Extension Agents In Kentucky, Misty D. Wilmoth

Morehead State Theses and Dissertations

A capstone submitted in partial fulfillment of the requirements for the degree of Doctor of Education in the Ernst and Sara Lane Volgenau College of Education at Morehead State University by Misty D. Wilmoth on April 13, 2020.

Extreme Fire As A Management Tool To Combat Regime Shifts In The Range Of The Endangered American Burying Beetle, Alison K. Ludwig, Daniel R. Uden, Dirac Twidwell

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

This study is focused on the population of federally-endangered American burying beetles in south-central Nebraska. It is focused on changes in land cover over time and at several levels of spatial scale, and how management efforts are impacting both the beetle and a changing landscape. Our findings are applicable to a large portion of the Great Plains, which is undergoing the same shift from grassland to woodland, and to areas where the beetle is still found.

Spinach In The Garden, Dan Drost

All Current Publications

This fact sheet describes spinach, recommended varieties, how to grow, planting and spacing, problems, harvest and storage, and nutrition.

Western Cherry Fruit Fly In Utah Orchards, Diane G. Alston, Marion Murray

All Current Publications

This fact sheet describes the western cherry fruit fly, including hosts, life history, timing control, host injury, and management.

Variance Heterogeneity Genome-Wide Mapping For Cadmium In Bread Wheat Reveals Novel Genomic Loci And Epistatic Interactions, Waseem Hussain, Malachy T. Campbell, Diego Jarquin, Harkamal Walia, Gota Morota

Department of Agronomy and Horticulture: Faculty Publications

Genome-wide association mapping identifies quantitative trait loci (QTL) that influence the mean differences between the marker genotypes for a given trait. While most loci influence the mean value of a trait, certain loci, known as variance heterogeneity QTL (vQTL) determine the variability of the trait instead of the mean trait value (mQTL). In the present study, we performed a variance heterogeneity genome-wide association study (vGWAS) for grain cadmium (Cd) concentration in bread wheat. We used double generalized linear model and hierarchical generalized linear model to identify vQTL associated with grain Cd. We identified novel vQTL regions on chromosomes 2A and …

Simulating Southern Rust Damage In Corn Through Defoliation, Michael Keith Shannon

LSU Master's Theses

The importance of leaf area to corn for grain production beginning at silking is well documented. However, being able to predict yield loss due to defoliators such as foliar plant diseases and insects that progressively increase in defoliation over time has been difficult to quantify. To address this issue, a leaf removal study was conducted at the Dean Lee Research and Extension Center located near Alexandria, Louisiana in 2017 and 2018. Two hybrids, differing in relative maturity were evaluated in this study. An early maturing hybrid (108 days in 2017 and 107 days in 2018) and a later maturing hybrid …

Registration Of Hard White Winter Wheat Germplasms Ks14u6380r5, Ks16u6380r10, And Ks16u6380r11 With Adult Plant Resistance To Stem Rust, Mary J. Guttieri, Robert L. Bowden, Katherine Reinhart, David S. Marshall, Yue Jin, Bradford W. Seabourn

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Resistance to the Ug99 group of races of the stem rust fungus Puccinia graminis f. sp. tritici is limited in winter wheat (Triticum aestivum L.) germplasm adapted to the Great Plains of the United States. Our objective was to generate regionally adapted hard winter wheat germplasm with combinations of adult plant resistance genes that are expected to provide durable resistance. KS14U6380R5 (Reg. no. GP-1043, PI 689115), KS16U6380R10 (Reg. no. GP-1044, PI 689116), and KS16U6380R11 (Reg. no. GP-1045, PI 689117) were derived from backcrosses of the hard white winter wheat germplasm KS05HW14 to the stem rust-resistant Kenyan spring wheat cultivar ‘Kingbird’. …

2020 Cares Act – Financial Supports For Small Business, Marilyn R. Schlake

Cornhusker Economics

Whether a business is impacted by weather-related disasters, road construction or sudden economic downturns, having a plan to mitigate the impacts can be crucial to the immediate and long-term survival of the business. Unforeseen circumstances, such as the COVID-19 pandemic, may require owners to re-evaluate their business models, cut operating costs and seek outside financial supports – all to keep cash flowing and the business open. To help small businesses during the pandemic, the Coronavirus Aid Relief, and Economic Security (CARES) Act was signed into law on March 27. It contains $349 billion in relief for American small businesses and …

2020 Cares Act – Apoyo Financiero Para Pequeñas Empresas, Marilyn R. Schlake, Sandra Barrera

Cornhusker Economics

Ya sea que un negocio se vea afectado por desastres relacionados con el clima, la construcción de carreteras o las recesiones económicas repentinas, tener un plan para mitigar los impactos puede ser crucial para la supervivencia inmediata y a largo plazo del negocio. Circunstancias imprevistas, como la pandemia de COVID-19, pueden requerir que los propietarios reevalúen sus modelos de negocios, reduzcan los costos operativos y busquen apoyos financieros externos, todo para mantener el flujo de efectivo y abrir el negocio. Para ayudar a las pequeñas empresas durante la pandemia, el 27 de marzo se promulgó la Ley de Ayuda y …

Impacts Of Commercial Biopesticides On Crapemyrtle Bark Scale (Acanthococcus Lagerstroemiae) And Beneficial Insects, Giovana Matos Franco

LSU Master's Theses

The crapemyrtle bark scale (CMBS), Acanthococcus lagerstroemiae (Kuwana) (Hemiptera: Eriococcidae), is an important pest of crapemyrtles, Lagerstromia spp. (Myrtales: Lythraceae) since its damage results in an unpleasant aesthetic. Current CMBS management methods depend heavily on pesticides which impact on beneficial insects. Biopesticides show potential for pest control, host specificity, and low impact towards non-target organisms. The objectives of my thesis were to determine (1) if biopesticides are effective against CMBS infestations when applied in different seasons, and (2) their effects towards coccinellids known to attack CMBS.

To test the efficacy of selected biopesticides, treatments were delivered to potted plants or …

Weather And Climate Summary And Forecast: April 2020 Report, Gregory V. Jones

Linfield University Wine Studies Reports

This report provides a summary of the weather and climate forecast for April 2020. It includes forecast information specific to the Pacific Northwest and the western United States, as well as forecast information for other portions of the United States and abroad.

Impacts Of 1.5 °C And 2 °C Global Warming On Net Primary Productivity And Carbon Balance In China’S Terrestrial Ecosystems, Li Yu, Fengxue Gu, Mei Huang, Bo Tao, Man Hao, Zhaosheng Wang

Plant and Soil Sciences Faculty Publications

Assessing potential impacts of 1.5 °C and 2 °C global warming and identifying the risks of further 0.5 °C warming are crucial for climate adaptation and disaster risk management. Four earth system models in the Coupled Model Intercomparison Project Phase 5 (CMIP5) and a process-based ecosystem model are used in this study to assess the impacts and potential risks of the two warming targets on the carbon cycle of China’s terrestrial ecosystems. Results show that warming generally stimulates the increase of net primary productivity (NPP) and net ecosystem productivity (NEP) under both representative concentration pathway (RCP) 4.5 and RCP8.5 scenarios. …