Agriculture Commons^™

Clomazone And Oxyfluorfen Combinations In A Flooded Rice System, Jason K. Norsworthy, Casey H. Arnold, Thomas R. Butts, Trenton L. Roberts, Chad W. Shelton

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Rice producers battle herbicide-resistant weeds worldwide while producing rice for ≥50% of the world’s population. Oxyfluorfen can provide rice producers with an alternative site of action for barnyardgrass control, as there are no documented cases of grass weeds being resistant to the herbicide in the mid-southern United States. Oxyfluorfen is anticipated to be labeled in the Roxy Rice Production System and may be sold as a clomazone/oxyfluorfen premixture; hence, experiments were conducted in 2021 and 2022 to evaluate preemergence-applied clomazone/oxyfluorfen ratios compared to clomazone alone on silt loam and clay soils. All ratios of the herbicides caused less than 7% …

Resistance To Acetyl Coenzyme A Carboxylase (Accase) Inhibitor In Lolium Multiflorum: Effect Of Multiple Target-Site Mutations, Gulab Rangani, Ana Claudia Langaro, Shilpi Agrawal, Reiofeli Algodon Salas-Perez, Juan Camilo Velasquez, Christopher E. Nelson, Nilda Roma-Burgos

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Italian ryegrass (Lolium multiflorum Lam.) is a persistent weed species that poses significant management challenges in key agricultural crops such as wheat, corn, cotton, and soybean. This study investigated the prevalence of resistance to ACCase inhibitor herbicides, specifically diclofop and pinoxaden, among field-collected Italian ryegrass populations. The survey revealed widespread resistance to diclofop and emerging cross-resistance to pinoxaden. To elucidate the physiological mechanism of ACCase herbicide resistance, we investigated mutations in the carboxyl-transferase (CT) domain of the ACCase enzyme, a critical region for herbicide sensitivity. Using dCAPS assays and CT domain sequencing, several known resistance-conferring mutations were detected in …

Oxyfluorfen Use In Combination With Clomazone Or Quinclorac, Jason K. Norsworthy, Casey H. Arnold, Thomas R. Butts, Chad W. Shelton

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Oxyfluorfen is a herbicide that inhibits protoporphyrinogen IX oxidase and has shown significant potential in its ability to control barnyardgrass. Oxyfluorfen is categorized as a Group 14 herbicide by the Herbicide Resistance Action Committee (HRAC)/Weed Science Society of America (WSSA). Despite its current lack of labeling for use on rice in the mid-southern United States due to its potential to cause crop injury, the introduction of a trait in rice that confers resistance to oxyfluorfen could provide producers with an effective alternative site of action for weed control. Field experiments were conducted during the 2021 and 2022 growing seasons near …

Blend Feeding Broilers To Daily Nutrient Requirements, J.T. Pope

Proceedings of the Arkansas Nutrition Conference

Broiler producers and nutritionists have used phase feeding as a practical means to define broiler feeding programs. Each feed phase has discreet nutrient definitions intended to be fed for a defined number of days based on a feed mass delivered per broiler. A typical broiler feeding program would consist of three to five feed phases over the production cycle that intend to address the changing nutrient requirements as broilers age. Phase feeding programs are easily defined, practical to manage, and provide a predictable cost structure for broiler producers. Despite the practicality of phase feeding, there are inherent flaws that will …

Current Trends And Experiences From A Contract Research Organization Perspective, Dan Moore

Proceedings of the Arkansas Nutrition Conference

The primary goal of this presentation is to provide an update on the trends of research observed at a contract research organization (CRO) in recent years as it relates to species, study design type and products tested, as well as, challenge models used and products that have shown benefits in various study designs. The information in the presentation is based off of studies conducted from 2014-2024 at one CRO, Colorado Quality Research (CQR), and represents the experiences at CQR. Many of the parameters discussed will be from 2014-2019 and 2020-2024 to observe trends from over 5 years ago and more …

Importance Of A Rooster Feed In Broiler Breeder Production, Alex Corzo, Marcelo Silva

Proceedings of the Arkansas Nutrition Conference

Of all feed phases in poultry production, rooster feeding is arguably the least studied. During the rear phase, there is general agreement that male and female broiler breeders can be provided a common feed program, only differing on feed amounts provided, that results in growth targets reached for each sex. It is during the production phase that there is some disagreement on the best way to support the nutritional needs of the adult rooster. A considerable segment of the world does employ a rooster feed as a way to better support the nutritional needs of working males. Other poultry operations …

Vitamin Update And Sustainability, Edgar Orlando Oviedo-Rondón

Proceedings of the Arkansas Nutrition Conference

This presentation addressed the status of research on vitamin nutrition in poultry species and current recommended levels. The economic, environmental, and socio-political aspects of sustainability are addressed. Most of the information presented is described in detail in the book Optimum Vitamin Nutrition for More Sustainable Poultry Farming (Oviedo-Rondon et al., 2023). However, this presentation also used more recent publications and news of the latest events related to scientific recommendations and the worldwide vitamin market. The objective is to provide a brief overview of scientific findings to aid nutritionists in the decision-making process when selecting optimum levels for poultry nutrition. …

Every Day Feeding Of Broiler Breeder Pullets, David Brandt

Proceedings of the Arkansas Nutrition Conference

Broiler breeders are characterized by their fast growth and sensitivity to light stimuli. Unlike commercial layers, they have a lower egg production rate and are kept on the floor during rearing and laying periods. Fertile eggs are the primary objective, necessitating careful management of their egg-laying properties, while controlling their body weights. Unrestricted feeding leads to early laying with poor peak and persistency in egg production. Therefore, nutrient intake must be restricted to achieve target body weights at light stimulation (22 weeks). This involves both quantitative and qualitative feed restrictions. Quantitative feed restriction can lead to issues such as poor …

Integration Of Commercial Broiler Data Into A Broiler Growth Model, David Brandt

Proceedings of the Arkansas Nutrition Conference

This study explores the alignment of theoretical broiler growth models with practical farm conditions, emphasizing the value of integrating commercial data into simulation models. The EFG Broiler Growth Model, developed by Emmens, Fisher and Gous, is highlighted for its mechanistic approach, predicting growth based on feed intake. While empirical models are useful, they are limited by changes in genetics. Both mechanistic and empirical models struggle to predict how broilers will respond to feed under the challenging conditions typically experienced in commercial operations. The study also discusses the development of empirical models to determine broiler responses to balanced protein and energy, …

Predicting Spatiotemporal Patterns Of Productivity And Grazing From Multispectral Data Using Neural Network Analysis Based On System Complexity, Amanda J. Ashworth, A. Avila, H. Smith, T. E. Winzeler, P. Owens, C. Flynn, P. O'Brien, D. Philipp, J. Su

Environmental Dynamics Faculty Publications and Presentations

Remote sensing tools, along with Global Navigation Satellite System cattle collars and digital soil maps, may help elucidate spatiotemporal relationships among soils, terrain, forages, and animals. However, standard computational procedures preclude systems-level evaluations across this continuum due to data inoperability and processing limitations. Deep learning, a subset of neural network, may elucidate efficiency of livestock production and linkages within the livestock-grazing environment. Consequently, we applied deep learning to environmental remote sensing data to (1) develop predictive models for yield and forage nutrition based on vegetation indices and (2) at a pixel-level (per 55 m²), identify how grazing is …

Potential Response Of Mexican Consumers To A Ban On Genetically Modified Maize Imports, Brandon R. Mcfadden, Lawton Nalley, Alvaro Durand-Morat, Wei Yang, Katie Loethen

Agricultural Economics and Agribusiness Faculty Publications and Presentations

Mexico enacted a decree to ban the sale of genetically modified (GM) maize seed and maize for human consumption. Maize is particularly important to the average diet in Mexico as it is the main feed for the primary source of protein (poultry) and the main ingredient for the primary source of calories (corn tortillas). This study aimed to assess consumer awareness of the decree, support for the decree, and sensitivity of support given possible economic outcomes related to the decree. Additionally, we estimate the premiums consumers were willing to pay (WTP) for non-GM products relative to GM products (i.e., chicken …

Estimating Prevented Planting Coverage Factor Variation, Christopher N. Boyer, Eunchun Park, Chad Hellwinckel, S. Aaron Smith, William Maples, Gabriela Perez-Quesada

Agricultural Economics and Agribusiness Faculty Publications and Presentations

Prevented planting payments reimburse crop producers for losses from not being able to plant. These payments provide critical protection to producers; however, these payments, which are determined using a nationwide, crop-specific coverage factor, have been questioned to induce moral hazard. Depending on the region and crop insurance coverage, payments from this provision exceed producers’ losses. This paper estimates the prevented planting coverage factor by coverage level and region that would equitably reimburse corn and soybean producers for their losses. We find the prevented planting coverage factor has significant variation across coverage levels and location within our study region. The prevented …

Early Season Wheat Response To Electrochemically Precipitated Struvite In Various Soils In The Greenhouse, Tatum Simms, Kristofor R. Brye, Trenton L. Roberts, Lauren F. Greenlee

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Fertilizer-phosphorus (P) materials can be recovered from wastewater and used to supplement mined phosphate rock, where one such material is struvite [MgNH4PO4·6(H2O)]. This study aimed to compare electrochemically precipitated struvite (ECST) reclaimed from synthetic wastewater to other commercial fertilizer-P sources in cultivated soils from Arkansas [silty clay loam (AR-SiCL) and silt loam (AR-SiL)], Missouri [(silt loam; MO-SiL 1 and 2)], and Nebraska [silt loam (NE-SiL) and sandy loam (NE-SL)]. A greenhouse pot study was conducted for 60 days with unvernalized wheat (Triticum aestivum) using five fertilizer-P sources [ECST, chemically precipitated struvite (CPST), monoammonium phosphate (MAP), triple superphosphate (TSP), …

Quantifying Temperature Effects On Plant Development Rates And Quality Of Compact Container-Grown Pepper, Ryan W. Dickson, Sonali Padhye, Leala M. Machesney, Josh Tebow

Horticulture Faculty Publications and Presentations

The mean daily temperature effects on plant development rates and quality of compact container-grown pepper were evaluated. Compact pepper cultivars Fresh Bites Yellow and Hot Burrito were grown in greenhouses at 18 to 26 °C (Expt. 1) and 20 to 30 °C (Expt. 2) under supplemental high-pressure sodium lighting and a 16-hour photoperiod. The number of days to first open flower, to first ripe fruit, and from flower to ripe fruit were measured and the development rates calculated by taking the reciprocal (e.g., 1/day). Temperature effects were predicted by fitting a nonlinear exponential function that included the base temperature ( …

Arkansas Wheat Performance Tests 2023-2024, J. F. Carlin, R. D. Bond, T. C. Swanson, J. C. Mccoy

Arkansas Agricultural Experiment Station Research Series

Wheat variety performance tests are conducted each year in Ark- ansas by the University of Arkansas System Division of Agriculture’s Arkansas Crop Variety Improvement Program. The tests provide information to companies developing cultivars and marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating variety recommendations for small-grain producers.

The tests were conducted at the Northeast Research and Extension Center at Keiser, the Vegetable Substation near Kibler, the Lon Mann Cotton Research Station near Marianna, the Pine Tree Research Station near Colt, and the Rohwer Research Station near Rohwer. Specific location and cultural practice information accompany …

Assessment Of Novel Protein Ingredient Arthrospira Platensis And Soybean Genotype Amino Acid And Oil Selection Improvements On Broiler Performance For A 28-42 D Feeding Period, Savannah C. Wells-Crofton, Kenneth B. Nelson, Garrett J. Mullenix, Craig W. Maynard, Michael T. Kidd

Poultry Science Faculty Publications and Presentations

Two experiments were conducted to assess the efficiency of including the novel protein ingredient Arthrospira platensis or improved soybean meal in a broiler diet. The first experiment aimed to determine the feeding value of soybean meal produced from varieties of soybeans bred for increased amino acid content (SBAA) and improved oil content (SBO) compared to a conventional soybean variety in an ANOVA design fed to Cobb 500 female broilers for 28–42 d. The SBAA and SBO soybeans contained overall higher amino acid content and lower oligosaccharide content compared to the conventional soybean variety in addition to improved oil quality. The …

Research Note: Carcass Yield And Meat Quality In High- And Low-Water Efficient Broiler Lines Exposed To Heat Stress, Sara Orlowski, Elizabeth Greene, Kentu Lassiter, Travis Tabler, Walter Bottje, Sami Dridi

Poultry Science Faculty Publications and Presentations

Heat stress (HS) and water scarcity are significant challenges to sustainable poultry production worldwide. It is, therefore, critical to identify effective strategies to prevent, withstand, or adapt to these challenges. After four generations of divergent selection for water efficiency, the present study was undertaken to determine the effect of HS on meat quality and muscle myopathy incidences in high (HWE)- and low (LWE)-water efficient broilers. Day-old male chicks (240 chicks/line) were allotted randomly by line and body weight-matched groups to 12 controlled-environmental chambers (2 pens/chamber). At d29, birds were exposed to 2 environmental conditions …

Titration Of Dietary Histidine During A 15 To 35 D Feeding Period In Male Cobb 500 Broilers, K. B. Nelson, S. C. Wells-Crafton, M. F. Costa, B. L. Angel, S. K. Rao, G. J. Mullenix, C. W. Maynard, Michael T. Kidd

Poultry Science Faculty Publications and Presentations

Dietary CP reductions in broilers can result in increased FCR when 6 or 7 feed-grade amino acids are allowed to enter formulation, and a partial explanation may be a dietary limitation of His. Histidine requirement data are sparce in the current body of literature, especially beyond 3 wk post-hatch. Therefore, a His dose-response experiment (expressed as a percentage of Lys) was conducted with male Cobb 500 broilers from 15 to 35 d post-hatch. A His deficient test diet was formulated to contain a digestible His to digestible Lys (dHis:dLys) ratio of 28.0%. Graded increments of L-His were added to the …

Glycine, Serine, And Arginine Additions To Cobb 500 Female Broilers Fed Dietary Variations In Crude Protein, M. A. Anas, N.S.B.M. Atapattu, K. B. Nelson, S. W. Crafton, Michael T. Kidd

Poultry Science Faculty Publications and Presentations

This study investigated the effects of supplemental Gly, Ser, and Arg on growth performance, carcass traits, footpad dermatitis, and litter ammonia emission of broilers fed low-protein diets from 18 to 42 d of age. A total 576 one-day-old female Cobb 500 broilers were divided into 6 dietary treatments: 1) control, high CP (HCP 20%), 2) medium CP (MCP 18%), 3) low CP (LCP 16%), 4) LCP + 0.20% Gly+Ser, 5) LCP + 0.20% Arg, and 6) LCP + 0.20% Gly+Ser + 0.20% Arg. Although BW gain and feed intake were not affected by treatments, reducing CP to LCP (16% CP) …

Early 1,25-Dihydroxyvitamin D3-Glycosides Supplementation: An Efficient Feeding Strategy Against Bacterial Chondronecrosis With Osteomyelitis Lameness In Broilers Assessed By Using An Aerosol Transmission Model, Andi Asnayanti, Khawla Alharbi, Anh Dang Trieu Do, Layla Al-Mitib, Kathrin Buhler, Jan Dirk Van Der Klis, Javier Gonzalez, Michael T. Kidd, Adnan A. Alrubaye

Poultry Science Faculty Publications and Presentations

Bacterial chondronecrosis with osteomyelitis (BCO) lameness is a leg disorder in broilers leading to huge economic losses, food safety concerns, and animal welfare issues in the poultry industry. The active metabolite of vitamin D₃, 1,25-dihydroxyvitamin D₃, plays pivotal roles in mineral homeostasis, bone health, and immune systems which are essential for protection against BCO. Thus, we hypothesized that supplementation with a Solanum glaucophyllum-derived source of 1,25-dihydroxyvitamin D₃ (1,25(OH)₂D₃-glycosides) would be an effective measure to control lameness. Here, we report the optimum concentration of 1,25(OH)₂D₃-glycosides …

Cover Crop And Wheel-Track Effects On Soil Properties Under Cotton Production In Eastern Arkansas, Shelby G. Lebeau, Kristofor R. Brye, Michael Daniels, Lisa S. Wood

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Repetitive use of heavy farm machinery in cultivated agriculture may cause soil compaction that can adversely affect soil-health-related properties. Cover crops (CC) are well-documented to alleviate problems associated with compaction and improve overall soil health in time. The objective of this field study was to evaluate the cumulative effects of CC treatment (i.e., with ≥ 6 years cereal rye [Secale cereale L.] CC and ≥ 4 years with no cover crop [NCC]) and sample/measurement placement (i.e., in the bed [B] and in the wheel-track [WT] and no-wheel-track [NWT] furrow) on near-surface soil physical-, chemical-, and infiltration-related properties in an …

The Impact Of Covid-19 On Livelihood Assets: A Case Study Of High-Value Crop Farmers In North-West Bangladesh, Umme Salma, Mohammad Janhangir Alam, Ismat Ara Begum, Md. Abdur Rouf Sarkar, Tamara Jackson, Tamanna Mastura, Md. Salauddin Palash, Andrew M. Mckensie, Avinash Kishore

Agricultural Economics and Agribusiness Faculty Publications and Presentations

The COVID-19 pandemic has had a catastrophic impact on public health, extending to the food system and people's livelihoods worldwide, including Bangladesh. This study aimed to ascertain the COVID-19 pandemic impacts on livelihood assets in the North-Western areas (Rajshahi and Rangpur) of Bangladesh. Primary data were collected from 320 farmers engaged in high-value agriculture using a multistage sampling method. The data were analysed using first-order structural equation modelling. The findings reveal a significant impact (p <  0.01) of the pandemic on all livelihood assets in Bangladesh. Notably, human assets exhibited the highest impact, with a coefficient of 0.740, followed sequentially by financial (0.709), social (0.684), natural (0.600), physical (0.542), and psychological (0.537) assets. Government-imposed lockdowns and mobility restrictions were identified as the major causes of the pandemic's negative effects on livelihoods, which included lost income, rising food prices, decreased purchasing power, inadequate access to food and medical supplies, increased social insecurity, and a rise in depression, worry, and anxiety among farmers. The effects of COVID-19 and associated policy measures on the livelihoods of high-value crop farmers have reversed substantial economic and nutritional advances gained over the previous decade. This study suggests attention to the sustainable livelihoods of farmers through direct cash transfer and input incentive programs to minimize their vulnerability to a pandemic like COVID-19 or any other crisis in the future.

Actuarial Implications Of Prevented Planting Coverage, Dylan Turner, Francis Tsiboe, Hunter D. Biram, Lawson Connor

Agricultural Economics and Agribusiness Faculty Publications and Presentations

Within the Federal Crop Insurance Program (FCIP), prevented planting (PP) coverage provides payments for pre-planting costs associated with crops that ultimately cannot be planted due to adverse weather. PP indemnities, which are not considered production losses within the FCIP rating methodology, influence premium rates differently than typical losses. This study utilizes a panel data set consisting of approximately 77,697 county level observations from RMA's summary of business to identify the relationship between the prevalence of prevent plant use and a number of actuarial related outcomes. Overall, we find that increases in the share of total indemnities attributable to PP claims …

Agriculture Students’ Use Of Generative Artificial Intelligence For Microcontroller Programming, Donald M. Johnson, Will Doss, Chris Estepp

Agricultural Education, Communications and Technology Faculty Publications and Presentations

Microcontrollers are widely used in agriculture, yet most undergraduate agriculture students do not have the programming skills necessary to make use of these devices in their academic programs or careers. However, generative artificial intelligence (AI) chatbots, such as ChatGPT, have the ability to write complex microcontroller programs when properly queried. The study was conducted to determine the effects of undergraduate agriculture students’ (n = 22) use of ChatGPT to write a microcontroller program on their programming task performance, self-efficacy, and attitudes toward generative AI. Nine of 11 (81.8%) student pairs were successful in the ChatGPT-assisted programming activity, requiring between …

Detection Of Fungicide Resistance In Population Of Corynespora Cassiicola From Arkansas Soybean And Cotton Fields, Rafael Zaia

Graduate Theses and Dissertations

Target spot, caused by the fungus Corynespora cassiicola, has reemerged since 2016 as an economically important disease on soybean and cotton across the Southern U.S. The quinone outside inhibitors (QoI) and succinate dehydrogenase inhibitors (SDHI) are important fungicide classes used to control foliar diseases in soybean and cotton. The efficacy of these products is rapidly decreasing, impacting control, and causing significant yield losses. The overall objective of this study was to determine the risks associated with chemical control by screening fungicide sensitivity, evaluating target site alterations, and analysis of disease control efficacy and yield response of fungicides for soybean in …

Evaluating Margin Protection (Mp) Crop Insurance As A Risk Management Tool For Rice Producers In Arkansas, Kaleem Azmat Chattha

Graduate Theses and Dissertations

Agricultural producers bear many risks, including production risks stemming from uncertainty in weather and pest pressure and price risks arising from market volatility. Federal Crop Insurance has become one of the most popular tools to manage these risks. While yield and revenue crop insurance tend to be the most popular production and price risk management tools provided by the government, participation in Margin Protection insurance lags far behind despite providing production, crop price, and input price risk protection. This study aims to uncover whether Margin Protection crop insurance is an effective risk management tool by estimating the optimal coverage level …

Employer's Perceptions Of The Agricultural Leadership Development Program At The University Of Arkansas, Samantha Jones

Graduate Theses and Dissertations

A review of the literature revealed a lack of peer-reviewed research on employer perceptions and expectations for agricultural leadership (AGLE) graduates. This study aimed to address this gap by identifying competencies necessary for effective education in AGLE programs. Utilizing a survey design, numerical data and qualitative responses, converted into numeric data to analyze frequency of concept occurrences were reported. A questionnaire, developed based on this study’s objectives and the Program System Model, was distributed to employers at the 2023 Dale Bumpers College of Agricultural, Food and Life Sciences Career Fair. The survey assessed employers’ perceptions of agricultural leadership programs, the …

Approaches To Controlling Palmer Amaranth And Its Interference In Furrow-Irrigated Rice, Tanner Austin King

Graduate Theses and Dissertations

Palmer amaranth (Amaranthus palmeri S. Wats) is the most troublesome and problematic weed in most mid-southern U.S. row crop production systems. With the increased adoption of furrow-irrigated rice (Oryza sativa L.), there is a greater occurrence of Palmer amaranth due to sustained moist conditions allowing continual emergence of the weed throughout the growing season. Palmer amaranth has previously been shown to negatively affect crop yields when left unmanaged. Therefore, there is a high potential for rice yield loss due to the weed’s ability to emerge over an extended period and interfere with crop development. However, there is a lack of …

Assessment Of The Drivers Of Adoption Of Climate Smart Agriculture Practices Among Field Crop Farmers In Zambia, Faindani Nyirenda

Graduate Theses and Dissertations

Climate smart agriculture (CSA) practiced has been promoted in Zambia since the 1980s to address the declining crop productivity due to increased occurrence of drought or dry spells caused by climate change. Despite considerable research indicating that CSA practices have many potential benefits such as increased yield and income, the adoption rate in southern Africa is still low especially where farmers have stable off farm income. This might be because most of the research and promotion has been directed to the main staple crop maize and other context specific impacts related to agroecological and socioeconomic heterogeneity. In this study we …

Measurement Reliability For Intentions To Change Behavior, Emily Schlichtig

Graduate Theses and Dissertations

It is common for researchers to ask participants to associate probabilities with words, often using tools like the Likert scale to measure behavioral intentions and attitudes. However, it remains unclear what specific probabilities participants assign to the response options on a Likert scale, how much variation exists across these options, and whether these probabilities differ across various behaviors. The purpose of this paper is to explore the numeric probabilities that participants associate with different Likert scale points, to understand their perception of the variation at each point, and to compare these perceptions across three behaviors: eating more vegetables, exercising more, …