Agriculture Commons^™

Impact Of Covid-19 On Course Presentation & The Efficacy, Madison Gartman

Undergraduate Research Conference

With the appearance of COVID-19 in March of 2020, classes on the campus of Stephen F. Austin State University’s (SFASU) were forced to move online out of concern for the health and safety of the faculty and students. Due to this fact, the modality of many courses was forced to change. With the change of modality, some students and faculty- who had limited experience with online classes- were forced to conquer the entirety of their course load and instruction online. However, with this abrupt change arose some creative teaching techniques that aided students’ remote academic success for the remainder of …

Nozzle Selection And Adjuvant Impact On The Efficacy Of Glyphosate And Ppo-Inhibiting Herbicide Tank-Mixtures, Jesaelen G. Moraes, Thomas R. Butts, Vitor M. Anunciato, Joe D. Luck, Wesley C. Hoffmann, Ulisses R. Antuniassi, Greg R. Kruger

Department of Agronomy and Horticulture: Faculty Publications

PPO-inhibiting herbicides in combination with glyphosate for postemergence applications is a common approach to manage glyphosate- and ALS-inhibitor-resistant weeds. PPO-inhibitors can reduce glyphosate translocation when applied in tank-mixtures, but adjuvants may be used to overcome this effect. Additionally, optimal droplet size may be affected by tank-mixtures of different herbicides and it can be crucial to herbicide efficacy. Field and greenhouse studies were conducted to investigate the impact of nozzle selection and adjuvants on weed control and interactions when applying PPO-inhibitors (fomesafen or lactofen) alone or in tank-mixture with glyphosate to five weed species using six nozzle types. Ultra-coarse droplets were …

Winter Wheat Resistant To Increases In Rain And Snow Intensity In A Semi-Arid System, Martin C. Holdrege, Karen H. Beard, Andrew Kulmatiski

Wildland Resources Faculty Publications

As the atmosphere warms, precipitation events have been predicted and observed to become fewer and larger. Changes in precipitation patterns can have large effects on dryland agricultural production, but experimental tests on the effects of changing precipitation intensity are limited. Over 3 years, we tested the effects of increased precipitation intensity on winter wheat (Triticum aestivum L.; Promontory variety) in a temperate dryland agricultural system that was on a rotation of crop and fallow years. We used 11 (2.1 × 2.5 m) shelters to collect and redeposit rain and snow as larger, more intense events. Total precipitation was the …

Civic Agriculture In Review: Then, Now, And Future Directions, Allison Kaika, Alexis Racelis

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

"Civic agriculture," a term first coined by rural sociologist Thomas Lyson, refers to forms of agriculture that occur on a local level, from production to consumption, and are linked to a community's social and economic development. Sixteen years since its original articulation, the term "civic agriculture" has taken on greater significance in research, political activism, and community organizing. Grown from the roots of civic community theory, civic agriculture functions as a new branch of civic community theory that is ripe for theorization. In revisiting the foundations of the term, this review paper seeks to consolidate current and future research in …

Intercropping Corn And Soybean: Profitability Of Different Agronomic Management Techniques, Raeann Lyn Huffman

Theses and Dissertations

Intercropping is the practice of growing multiple crops together in the same field. This is not commonly implemented in Midwest agriculture - instead, current monoculture practices have garnered attention because of the negative environmental impacts of monoculture farming. For this study, corn and soybean were intercropped in a production agriculture setting to investigate the benefits to the producer and the environment. Intercropping corn and soybean crops may reduce the need for added nitrogen (N) fertilizer, saving money on inputs and potential loss of N from the farm to the environment. Soybeans within the system may utilize less of the soil …

Widespread Mortality Of Trembling Aspen (Populus Tremuloides) Throughout Interior Alaskan Boreal Forests Resulting From A Novel Canker Disease, Roger W. Ruess, Loretta M. Winton, Gerard C. Adams

Aspen Bibliography

Over the past several decades, growth declines and mortality of trembling aspen throughout western Canada and the United States have been linked to drought, often interacting with outbreaks of insects and fungal pathogens, resulting in a “sudden aspen decline” throughout much of aspen’s range. In 2015, we noticed an aggressive fungal canker causing widespread mortality of aspen throughout interior Alaska and initiated a study to quantify potential drivers for the incidence, virulence, and distribution of the disease. Stand-level infection rates among 88 study sites distributed across 6 Alaska ecoregions ranged from < 1 to 69%, with the proportion of trees with canker that were dead averaging 70% across all sites. The disease is most prevalent north of the Alaska Range within the Tanana Kuskokwim ecoregion. Modeling canker probability as a function of ecoregion, stand structure, landscape position, and climate revealed that smaller-diameter trees in older stands with greater aspen basal area have the highest canker incidence and mortality, while younger trees in younger stands appear virtually immune to the disease. Sites with higher summer vapor pressure deficits had significantly higher levels of canker infection and mortality. We believe the combined effects of this novel fungal canker pathogen, drought, and the persistent aspen leaf miner outbreak are triggering feedbacks between carbon starvation and hydraulic failure that are ultimately driving widespread mortality. Warmer early-season temperatures and prolonged late summer drought are leading to larger and more severe wildfires throughout interior Alaska that are favoring a shift from black spruce to forests dominated by Alaska paper birch and aspen. Widespread aspen mortality fostered by this rapidly spreading pathogen has significant implications for successional dynamics, ecosystem function, and feedbacks to disturbance regimes, particularly on sites too dry for Alaska paper birch.

Historic Declines In Growth Portend Trembling Aspen Death During A Contemporary Leaf Miner Outbreak In Alaska, Melissa A. Boyd, Logan T. Berner, Adrianna C. Foster, Scott J. Goetz, Brendan M. Rogers, Xanthe J. Walker, Michelle C. Mack

Aspen Bibliography

Climate change-driven droughts and insect outbreaks are becoming more frequent and widespread, increasing forest vulnerability to mortality. By addressing the impacts of climate and insects on tree growth preceding death, we can better understand tree mortality risk under a changing climate. Here, we used tree stature and interannual growth (basal area increment; BAI) to assess processes leading to trembling aspen (Populus tremuloides) survival or mortality during an unprecedented leaf miner (Phyllocnistis populiella) outbreak in boreal North America. We identified eight sites (22 plots) in the longest running forest monitoring network in Alaska, spanning ~350 km of …

Do Long-Term Conservation Pasture Management Practices Influence Microbial Diversity And Antimicrobial Resistant Genes In Runoff?, Yichao Yang, Amanda J. Ashworth, Lisa M. Durso, Mary Savin, Jennifer M. Debruyn, Kimberly Cook, Philip A. Moore Jr, Philip R. Owens

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

Runoff from land-applied manure and poultry litter is one mechanism by which manure-borne bacteria are transported over large distances in the environment. There is a global concern that antimicrobial resistant (AMR) genes may be transmitted through the food chain from animal manures to soil to surface water. However, details are lacking on the ecology of AMR genes in water runoff as well as how conservation management practices may affect the runoff microbiome or minimize the movement of AMR genes. The aim of this study was to identify microbial community structure and diversity in water runoff following 14-years of poultry litter …

Steps To Become A Welcoming Community, Cheryl A. Burkhart-Kriesel

Cornhusker Economics

Just because some rural areas are declining does not mean that all areas are declining or are destined to decline. Rural population gains are often seen in high amenity counties that support both tourism and early retiree relocation and in counties that are located just beyond metropolitan borders. But those are not the only places where gains are being made. Rural areas across the nation are becoming more culturally diverse with “racial and ethnic minorities accounting for 83 percent of rural population growth between 2000 and 2010” (Johnson, 2012).

The One – Way (Agri)Cultural Mirror: A Case Study Of How Young Agriculturalists Understand And Experience Culture, Janiece M. Pigg

LSU Master's Theses

As the global economy continues to transform how society operates, cultural competence has become a buzzword in education, professional development, research, government, and healthcare (Gay, 1994; Gallus et al., 2014). Cross et al. (1989) developed the most accepted definition of cultural competence: “a set of congruent behaviors, attitudes, and policies that come together in a system, agency, or among professionals and enable that system, agency, or those professionals to work effectively in cross-cultural situations” (p. 13).

Despite this, little to no research has been devoted to understanding cultural competence in agriculture. Thus, a need emerged to describe the cultural competence …

Implementing Four Modeling Improvement Strategies To Measure The Economic Contribution Of The Alligator Farming Industry In Louisiana, Ilich Fernan Rosales Chiessa

LSU Master's Theses

The alligator industry in Louisiana has not had a study in thirty years that has measured its economic contribution. The industry has changed structurally over that period, and it produces more alligator skins but is concentrated in a smaller number of producers. With current threats to the industry through potential bans on alligator sales in states like California, the importance of these studies for the industry are more important now than ever. This study measures the economic contribution of American alligator across the supply chain of the state of Louisiana through four different modeling improvement strategies. These consist of using …

Weather And Climate Summary And Forecast: April 2021 Report, Gregory V. Jones

Linfield University Wine Studies Reports

This report provides a summary of the weather and climate forecast for April 2021. 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.

The Effect Of Increasing Temperature On Crop Photosynthesis: From Enzymes To Ecosystems, Caitlin E. Moore, Katherine Meacham-Hensold, Pauline Lemonnier, Rebecca A. Slattery, Claire Benjamin, Carl J. Bernacchi, Tracy Lawson, Amanda P. Cavanagh

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

As global land surface temperature continues to rise and heatwave events increase in frequency, duration, and/or intensity, our key food and fuel cropping systems will likely face increased heat-related stress. A large volume of literature exists on exploring measured and modelled impacts of rising temperature on crop photosynthesis, from enzymatic responses within the leaf up to larger ecosystem-scale responses that reflect seasonal and interannual crop responses to heat. This review discusses (i) how crop photosynthesis changes with temperature at the enzymatic scale within the leaf; (ii) how stomata and plant transport systems are affected by temperature; (iii) what features make …

Iot Based Agriculture 4.0: Challenges And Opportunities, Halimjon Khujamatov, Temur Toshtemirov Mr., Doston Turayevich Khasanov Mr., Nasiba Saburova Ms., Ilhom Ikromovich Xamroyev Mr.

Bulletin of TUIT: Management and Communication Technologies

In recent years, the world's population growth has been intensifying, resulting in specific problems related to the depletion of natural resources, food shortages, declining fertile lands, and changing weather conditions. This paper has been discussed the use of IoT technology as a solution to such problems.

At the same time, the emergence of IoT technology has given rise to a new research direction in agriculture. Soil analysis and monitoring using Zigbee wireless sensor network technology, which is part of the IoT, will enable the creation of an IoT ecosystem as well as the development of smart agriculture. In addition, entrepreneurship, …

Attitudes Of Fruit And Vegetable Farmers Towards Organic Farming In Kathmandu Valley, Nepal, Dilip Nandwani, Dinesh Jamarkattel, Khem Raj Dahal, Ritikshya Poudel, Suman Giri, Toya Nath Joshi

Agricultural and Environmental Sciences Faculty Research

Organic farming is increasingly popular among the farmers of Kathmandu valley. However, the organic growers have been facing issues in production, organic certification, and product marketing. To date, little is known about the challenges faced by the organic growers in Kathmandu valley. This study aimed to explore the status of organic farming, attitudes of farmers towards organic farming, their suggestions for improvement, and strengthening the value chain of organic products. Face-to-face interviews were conducted at Agriculture Knowledge Centre, Lalitpur, Nepal during December 2019 with 37 organic growers directly or indirectly involved in organic farming. The results showed that organic growers …

Comparison Of Three Commercial Automatic Boom Height Systems For Agricultural Sprayers, Travis A. Burgers, John D. Gaard, Brian J. Hyronimus

Mechanical Engineering Faculty Publications

Automatic boom height systems reduce the variability of agricultural sprayer boom height. Consistent boom height is important for three key reasons: to reduce uneven spray dispersion if the boom is too low, to reduce spray droplet drift if the boom is too high, and to reduce damage to the boom or crop if the boom is too low. No data is available comparing commercial boom height systems. Three leading North American automatic boom height systems were compared: John Deere BoomTrac Pro (System A), Raven AutoBoom® XRT (System B), and Norac UC5TM Passive Roll (System C) on a John Deere R4045 …

Mining 30 Years Of Conifer Records At The Baker Arboretum, Monika Decker

Masters Theses & Specialist Projects

Only limited data had been published on the survivability of specimens within public gardens. This may be due to not enough data collected or how vast the plant selections are in the gardens. The Baker Arboretum has collected data by accessioning plant collections over a period of 30 years. The Baker Arboretum has its specimens GIS mapped on the 115-acre property for easy location and detection of the the woody ornamental plants. However, little research is available to understand which coniferous specimens have the best success in the garden. In this study, six separate binomial logistic regressions were run to …

Evaluation Of Supplementing Whole Cottonseed Within Feedlot Rations During The Stockerphase Of Production With The Goal Of Increasing Average Daily Gain, Emily Lauren Cook

Masters Theses & Specialist Projects

Beef calves are weaned at 6-months of age and enter the stocker phase of beef production. Stocker producers have the primary goal of adding weight inexpensively to increase profit on weaned calves. Whole cottonseed is an inexpensive feed ingredient that is popularly top-dressed within dairy and finishing beef diets and is high in protein and energy. During three periods lasting 50-days (fall 2019, fall 2020, and spring 2020), freshly weaned calves were placed on a finishing ration with the goal of increasing average daily gain. Base rations were calculated at 25% tall fescue hay, 23% corn, and 52% distillers’ solubles. …

Effects Of Solid Matrix One-Step Planting Practice On Cool Season Turfgrass Germination In Unfavorable Conditions, Ben Duncan

Masters Theses & Specialist Projects

The transition zone in the United States is a difficult area to grow and establish turfgrasses. To establish or repair damaged turfgrass areas, seed priming is an often-used practice. Turfgrass companies and researchers are expanding the practice of solid matrix priming to the practice of one step planting. These products contain seed, fertilizers, and often some type of inert matter and/or mulch. This study took place in Bowling Green, KY and Knoxville, TN during the same period to investigate the effects of using these one step planting products compared to standard cool season turfgrass seeding practices. Two Pennington and two …

Small Gas Engines Interactive Notebook, P. Troy White

STEM & Agricultural Education Curriculum Resources

A Small Gas Engines interactive notebook to help prepare students for the Briggs & Stratton Master Service Technician Exam 1.