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Articles 61 - 90 of 1015
Full-Text Articles in Agronomy and Crop Sciences
Site Position, Tillage, And Soil Depth Effects On Soil Properties In A Furrow-Irrigated Rice Field On A Silt-Loam Soil, Hannah Nobles, Kristofor Brye, Diego Della Lunga
Site Position, Tillage, And Soil Depth Effects On Soil Properties In A Furrow-Irrigated Rice Field On A Silt-Loam Soil, Hannah Nobles, Kristofor Brye, Diego Della Lunga
Crop, Soil and Environmental Sciences Undergraduate Honors Theses
The fundamental agronomic shift from conventional agricultural methods to conservation agriculture relies on understanding soil nutrient stratification with depth and under different tillage treatments. Assessment of nutrient stratification in the dynamic conditions of furrow-irrigated rice (Oryza sativa) systems in eastern Arkansas is absent. The objective of this study was to evaluate the effects of tillage [i.e., conventional tillage (CT) and no tillage (NT], site position (i.e., up-, mid-, and down-slope), soil depth interval (i.e., 0-10 and 10-20 cm), and their interaction on the difference (i.e., end of the season minus beginning of the season) in select soil chemical …
Compact Solar-Powered Plasma Water Generator: Enhanced Germination Of Aged Seed With The Corona Dielectric Barrier Discharger, Yiting Xiao, Yang Tian, Haizheng Xiong, Ainong Shi, Jun Zhu
Compact Solar-Powered Plasma Water Generator: Enhanced Germination Of Aged Seed With The Corona Dielectric Barrier Discharger, Yiting Xiao, Yang Tian, Haizheng Xiong, Ainong Shi, Jun Zhu
Biological and Agricultural Engineering Faculty Publications and Presentations
Seed aging adversely affects agricultural productivity by reducing germination rates and seedling vigor, leading to significant costs for seed banks and companies due to the need for frequent seed renewals. This study demonstrated the use of plasma-activated water (PAW), generated by a solar-powered corona dielectric barrier discharger, to enhance germination rates of spinach seeds that had been stored at 4 °C for 23 years. Treating seeds with PAW at 17 kV for 15 min improved germination (by 135%) and seedling growth compared to untreated seeds. Through detailed analysis, beneficial PAW properties for seed development were identified, and a molecular mechanism …
Rice Response To Struvite And Other Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Rice Response To Struvite And Other Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Wastewater-recovered phosphorus (P), in the form of the mineral struvite (MgNH4PO4⋅6H2O), may provide a sustainable alternative to decreasing rock-phosphate reserves. Struvite can be generated via precipitation methods, potentially reducing the amount of P runoff to aquatic ecosystems. The objective of this greenhouse tub study was to evaluate the effects of chemically- and electrochemically precipitated struvite (CPST and ECST, respectively) on above- and belowground plant response in a hybrid rice (Oryza sativa) cultivar grown using furrow-irrigation compared to other common fertilizer-P sources [i.e., triple super phosphate (TSP) and diammonium phosphate (DAP)]. Rice was …
North Dakota Corn Efficiency Frontier: Stochastic Frontier Analysis, Bayarbat Badarch, David C. Roberts, Michael P. Popp
North Dakota Corn Efficiency Frontier: Stochastic Frontier Analysis, Bayarbat Badarch, David C. Roberts, Michael P. Popp
Agricultural Economics and Agribusiness Faculty Publications and Presentations
According to climate studies in North Dakota, the state's crop-growing season has been extended. In addition, many studies have shown technological advances in crop production. However, the state has not addressed how crop yield has been affected by weather changes. Thus, this paper investigates the state's corn (Zea mays) yield potential and efficiency measures based on agricultural input use and weather variables from 1994 to 2018. We found that the effects of temperature and precipitation on the state's corn yield frontier (potential) were greater than those of changing agricultural input variables. The stochastic frontier model indicates that the …
Enhancing Selection Intensity With High-Throughput Phenotyping Data In Plant Breeding, Ashmita Upadhyay
Enhancing Selection Intensity With High-Throughput Phenotyping Data In Plant Breeding, Ashmita Upadhyay
Graduate Theses and Dissertations
Genomic prediction (GP) has proven to be an essential tool to accelerate the cultivar development pipeline by predicting the performance of un-phenotyped lines in the field of plant breeding. However, the prediction accuracy is bounded by the heritability of the target trait, limiting the efficiency of the single-trait GP model. To overcome the limitation, a multi-trait genomic prediction model using high-throughput phenotyping (HTP) data can be used to leverage secondary traits to boost the predictive ability of the target trait. This study aimed to assess the efficiency of the multi-trait (MT)- GP model powered by HTP derived secondary traits in …
Use Of A Capsule Suspension Formulation Of S-Metolachlor In Fenclorim-Treated Rice, Jason K. Norsworthy, Samuel C. Noe, Thomas R. Butts, Trenton L. Roberts
Use Of A Capsule Suspension Formulation Of S-Metolachlor In Fenclorim-Treated Rice, Jason K. Norsworthy, Samuel C. Noe, Thomas R. Butts, Trenton L. Roberts
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
As herbicide resistance continues to render commonly used rice herbicides ineffective, alternative sites of action are paramount to maintaining yield and producer profitability. Combining a slow-release formulation and a fenclorim seed treatment might allow the safe use of S-metolachlor in rice. Experiments were initiated in 2022 and 2023 near Colt, AR, on a silt loam soil to evaluate crop safety using a capsule suspension (CS) formulation of S-metolachlor and a fenclorim seed treatment in rice. The first experiment assessed the tolerance of two cultivars (‘Diamond’ and ‘DG263L’) to three rates (0.42, 0.84, and 1.68 kg ai ha−1 …
How Does Herbicide Resistance Change Farmer’S Weed Management Decisions? Evidence From The Roundup Ready Experiment, Huichin Sun, Terrance Hurley, George B. Frisvold, Katherine Dentzman, David Ervin, Wesley J. Everman, Jeffrey Gonsalus, Jason K. Norsworthy, Michae Owen
How Does Herbicide Resistance Change Farmer’S Weed Management Decisions? Evidence From The Roundup Ready Experiment, Huichin Sun, Terrance Hurley, George B. Frisvold, Katherine Dentzman, David Ervin, Wesley J. Everman, Jeffrey Gonsalus, Jason K. Norsworthy, Michae Owen
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Adoption of diverse weed management practices is viewed as essential for slowing the spread of herbicide-resistant (HR) weeds. Yet, adoption of diverse tactics has remained low, while there has been explosive growth of resistant weeds. This study analyzes U.S.-farm-level data to identify factors affecting adoption of diverse weed management practices. This study uses directed acyclic graphs (DAGs) to consider how practice adoption is influenced by different causal pathways between farmer and farm characteristics and farmer awareness of and concern over HR weeds. This study then uses multiple regression analysis to estimate the direct and indirect pathways that influence practice adoption. …
Soft Red Winter Wheat Elite Germplasm Screening And Evaluation For Stripe Rust In The Us Southeast Region, Ehsan Shakiba, Noah Dewitt, Ali Babar, Richard E. Boyles, Mohamed Mergoum, Russell Sutton, Jeanette Lyerly, Stephen Harrison
Soft Red Winter Wheat Elite Germplasm Screening And Evaluation For Stripe Rust In The Us Southeast Region, Ehsan Shakiba, Noah Dewitt, Ali Babar, Richard E. Boyles, Mohamed Mergoum, Russell Sutton, Jeanette Lyerly, Stephen Harrison
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Stripe rust is a severe disease affecting wheat (Triticum aestivum L.) production in the United States Southeast region, necessitating the identification of resistant sources. The study was conducted at the University of Arkansas, Fayetteville, and utilized a Randomized Block Design over three years. A total of 1130 lines were inoculated annually, and their responses for stripe rust were recorded. The results revealed that 11%, 79%, and 77% of the lines showed resistance in the first, second, and third years, respectively, with an overall 50% of the whole population. Linear Mixed Model and Generalized Estimating Equation analyses highlighted environmental influences, …
Clomazone And Oxyfluorfen Combinations In A Flooded Rice System, Jason K. Norsworthy, Casey H. Arnold, Thomas R. Butts, Trenton L. Roberts, Chad W. Shelton
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
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
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 …
Minimizing Risks Of Off-Target Movement Of Florpyrauxifen-Benzyl By Coating Onto Urea, Bodie L. Cotter, Jason K. Norsworthy, Thomas R. Butts, Trenton L. Roberts, Andy Mauromostakos
Minimizing Risks Of Off-Target Movement Of Florpyrauxifen-Benzyl By Coating Onto Urea, Bodie L. Cotter, Jason K. Norsworthy, Thomas R. Butts, Trenton L. Roberts, Andy Mauromostakos
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Commercialization of florpyrauxifen-benzyl as Loyant® in 2018 as a synthetic auxin herbicide in rice was followed by soybean injury due to off-target movement of spray applications in the mid-southern United States. Concerns surrounding off-target movement led to the exploration of an alternative application method to help alleviate the issue. Field experiments were conducted in 2020 and 2021 to explore the likelihood of a reduction in soybean injury following applications of florpyrauxifen-benzyl coated on urea in narrow- and wide-row soybean systems and to determine the likelihood of volatilization from this novel application method. Florpyrauxifen-benzyl spray-applied at 0.18 g ai ha …
Near-Surface Soil Chemical Properties As Affected By Cover Crops Over Time In The Lower Mississippi River Valley, Cooper Fanning, Kristofor R. Brye, Michael B. Daniels, Trenton Roberts, Samuel B. Fernandes, Lisa Wood
Near-Surface Soil Chemical Properties As Affected By Cover Crops Over Time In The Lower Mississippi River Valley, Cooper Fanning, Kristofor R. Brye, Michael B. Daniels, Trenton Roberts, Samuel B. Fernandes, Lisa Wood
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Typical row-crop agricultural practices can potentially be harmful to soil health and future sustainability. The use of cover crops (CC) as a mechanism to improve soil health on a wide scale remains underutilized. Soil health remains a major concern for the sustainability of agricultural productivity, therefore, research into CC implementation as a mean to preserve or improve soil health is warranted. The objective of this study was to evaluate the effects of CC on the soils in the eastern Arkansas portion of the Lower Mississippi River Valley (LMRV) over time for various chemical soil parameters, including pH, soil organic matter …
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
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 …
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
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), …
Detection Of Fungicide Resistance In Population Of Corynespora Cassiicola From Arkansas Soybean And Cotton Fields, Rafael Zaia
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 …
Assessment Of The Drivers Of Adoption Of Climate Smart Agriculture Practices Among Field Crop Farmers In Zambia, Faindani Nyirenda
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 …
The Effects Of Cover Crop Adoption On Yield Distributions Under Extreme Drought, Emory Johnson
The Effects Of Cover Crop Adoption On Yield Distributions Under Extreme Drought, Emory Johnson
Graduate Theses and Dissertations
Increased frequency and severity of extreme weather events due to climate change negatively impact agriculture output. Of particular concern is the adverse impact of droughts on corn and soybean yields, as these crops represent a significant portion of cash crop receipts in the United States. Cover crops are one practice that has gained attention due to their agronomic benefits and their potential to reduce downside production risk for producers. This study focuses on the impact of cover crop adoption on corn and soybean yields during drought conditions. We use cover crop adoption data from the Operational Tillage Information System, RMA …
Using Machine Learning To Combine Genetic And Environmental Data For Maize Grain Yield Predictions Across Multi-Environment Trials, Igor K. Fernandes, Caio C. Vieira, Kaio O.G. Dias, Samuel B. Fernandes
Using Machine Learning To Combine Genetic And Environmental Data For Maize Grain Yield Predictions Across Multi-Environment Trials, Igor K. Fernandes, Caio C. Vieira, Kaio O.G. Dias, Samuel B. Fernandes
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Complementing phenotypic traits and molecular markers with high-dimensional data such as climate and soil information is becoming a common practice in breeding programs. This study explored new ways to combine non-genetic information in genomic prediction models using machine learning. Using the multi-environment trial data from the Genomes To Fields initiative, different models to predict maize grain yield were adjusted using various inputs: genetic, environmental, or a combination of both, either in an additive (genetic-and-environmental; G+E) or a multiplicative (genotype-by-environment interaction; GEI) manner. When including environmental data, the mean prediction accuracy of machine learning genomic prediction models increased up to 7% …
B.R. Wells Arkansas Rice Research Studies 2023, J. Hardke, X. Sha, N. Bateman
B.R. Wells Arkansas Rice Research Studies 2023, J. Hardke, X. Sha, N. Bateman
Arkansas Agricultural Experiment Station Research Series
Arkansas is the leading rice producer in the United States. The state represents 49.0% of total U.S. rice production and 49.6% of the total acres planted to rice in 2023. Rice cultural practices vary across the state and across the U.S. However, these practices are also dynamic and continue to evolve in response to changing political, environmental, and economic times. This survey was initiated in 2002 to monitor and record changes in the way Arkansas rice producers approach their livelihood. The survey was conducted by polling county extension agents in each of the counties in Arkansas that produce rice. Questions …
Use Of Herbicides Coated Onto Fertilizer And Applied Over-The-Top Of Cotton, Summer Linn
Use Of Herbicides Coated Onto Fertilizer And Applied Over-The-Top Of Cotton, Summer Linn
Graduate Theses and Dissertations
Cotton (Gossypium hirsutum L.) production faces numerous challenges, many related to weed management. A herbicide application method that focuses on combing resources that producers already have access to, such as herbicide-coated fertilizers, could be a practical approach for addressing late-season control of Palmer amaranth (Amaranthus palmeri S. Wats) and other problematic weed species. Two main factors would potentially impact the efficiency of utilizing this method: cotton tolerance to the application and weed control provided by the herbicide-coated fertilizers. Some considerations could affect the efficacy of these applications, such as when the treatments are applied and when they are activated by …
Evaluation Of A Diflufenican:Metribuzin:Flufenacet Premixture For Soybean Tolerance And Weed Control, Matthew Coleman Woolard
Evaluation Of A Diflufenican:Metribuzin:Flufenacet Premixture For Soybean Tolerance And Weed Control, Matthew Coleman Woolard
Graduate Theses and Dissertations
Palmer amaranth [Amaranthus palmeri (S.) Wats.] and waterhemp [Amaranthus tuberculatus (Moq.) Sauer] ranks among the most troublesome weeds of soybean [Glycine max (L.) Merr.], having evolved resistance to multiple herbicide sites of action. Bayer CropScience has announced its intentions to launch Convintro™ brand herbicides, one being a three-way premixture for use preplant until 3 d after planting in soybean. The premixture will include diflufenican (WSSA Group 12), metribuzin (WSSA Group 5), and flufenacet (WSSA Group 15) (DFF-containing premixture), adding a new site of action for use in soybean throughout the United States. In 2022 and 2023, field trials were conducted …
Approaches To Controlling Palmer Amaranth And Its Interference In Furrow-Irrigated Rice, Tanner Austin King
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 …
Evaluation Of A Capsule Suspension Formulation Of S-Metolachlor For Use In Fenclorim-Treated Rice And Wheat, Samuel Charles Noe
Evaluation Of A Capsule Suspension Formulation Of S-Metolachlor For Use In Fenclorim-Treated Rice And Wheat, Samuel Charles Noe
Graduate Theses and Dissertations
The continued evolution of herbicide resistance is one of the primary concerns facing Arkansas growers today. Problematic weeds such as barnyardgrass [Echinochloa crus-galli (L.) Beauv.] and Italian ryegrass [Lolium perenne L. ssp. multiflorum (Lam.) Husnot] have evolved resistance to some of the most used herbicides in rice (Oryza sativa L.) and wheat (Triticum aestivum L.). To counteract this resistance, alternative herbicide sites of action should be explored. S-metolachlor is a very-long-chain fatty acid (VLCFA)-inhibiting herbicide [Herbicide Resistance Action Committee (HRAC)/Weed Science Society of America (WSSA) Group 15] commonly used in U.S. row crops to control grasses and small-seeded broadleaf weeds. …
Arkansas Corn And Grain Sorghum Research Studies 2023, Jason Kelley, Travis Faske
Arkansas Corn And Grain Sorghum Research Studies 2023, Jason Kelley, Travis Faske
Arkansas Agricultural Experiment Station Research Series
The 2023 edition of the Arkansas Corn and Grain Sorghum Research Studies Series includes research results on topics pertaining to corn and grain sorghum production, including weed, disease, and insect management; economics; irrigation; agronomics; soil fertility; mycotoxins; cover crop management; and research verification program results. Our objective is to capture and broadly distribute the results of research projects funded by the Arkansas Corn and Grain Sorghum Board. The intended audience includes producers and their advisors, current investigators, and future researchers. The Series serves as a citable archive of research results.
Evaluating Injury Risk Caused By Potential Drift Of Florpyrauxifen-Benzyl Or Quinclorac In Corn, Amar Godar, Jason K. Norsworthy, L. Barber
Evaluating Injury Risk Caused By Potential Drift Of Florpyrauxifen-Benzyl Or Quinclorac In Corn, Amar Godar, Jason K. Norsworthy, L. Barber
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Of relevance to the off-target movement of herbicides in Arkansas is the drift of rice herbicides in the state’s agricultural landscape, where aerial application of herbicides is common, raising the prima facie question of the risk of damage to other sensitive crops. The aim of this study was to evaluate the response of corn to postemergence applications of florpyrauxifen-benzyl or quinclorac, which were applied directly to the crop at low rates (0.78 or 1.56 to 12.5% of the normal use rate for labeled crops). This was investigated through three site-year field experiments conducted in Fayetteville (2020 and 2021) and Tillar …
Summaries Of Arkansas Cotton Research 2023, Fred Bourland
Summaries Of Arkansas Cotton Research 2023, Fred Bourland
Arkansas Agricultural Experiment Station Research Series
With current production costs and cotton prices, either record or near-record yields are needed for profitable cotton production in Arkansas. As usual, price volatility in 2023 added another level of difficulty in the quest for being profitable. Cotton futures traded between 80 and 90 cents per pound in 2023, with brief times below 80 cents and above 90 cents. In April, cotton futures dropped below 80 cents per pound, the lowest level in almost four months. This was due to an increase in certificated stocks, declining demand, and a growing world carryover. The average cotton price received by U.S. growers …
Agronomic And Economic Productivity Of Summer Annual Forage Systems Under Different Poultry Litter Application Methods, Ivanelle Meyer, Michael P. Popp, Christine C. Nieman, Amanda J. Ashworth, Phillip R. Owens
Agronomic And Economic Productivity Of Summer Annual Forage Systems Under Different Poultry Litter Application Methods, Ivanelle Meyer, Michael P. Popp, Christine C. Nieman, Amanda J. Ashworth, Phillip R. Owens
Agricultural Economics and Agribusiness Faculty Publications and Presentations
Poultry litter (litter) is a nutrient dense fertilizer that increases nutritive value and yield in pastures in the mid-southern US. Nutrient losses due to runoff and nitrogen volatilization are common when broadcasting litter. As such, incorporating litter below the soil surface (subsurface) was evaluated in comparison to broadcasting in 2021 and 2022 by quantifying yield and nutritive value of annual forages. The study was a randomized complete block design with three forage treatments—sorghum-sudangrass only (Sorghum bicolor L.), cowpea only (Vigna unguiculata L.), and their mixture, and three litter application methods (broadcast, subsurface, and a no litter control). Litter …
Soil Profile Distribution Of Nutrients In Contrasting Soils Amended With Struvite And Other Conventional Phosphorus Fertilizers, Tatum Simms, Kristofor R. Brye, Trenton L. Roberts, Lauren F. Greenlee
Soil Profile Distribution Of Nutrients In Contrasting Soils Amended With Struvite And Other Conventional Phosphorus Fertilizers, Tatum Simms, Kristofor R. Brye, Trenton L. Roberts, Lauren F. Greenlee
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Phosphorus (P) can be recovered from wastewater and used as an alternative fertilizer, namely, struvite [MgNH4PO4·6(H2O)]. However, the soil mobility of wastewater-derived P and other nutrients needs to be evaluated. The objective of this study was to compare the vertical distribution of water-soluble (WS) soil P and other nutrients from a synthetic-wastewater-derived electrochemically precipitated struvite (ECST) to that from a chemically precipitated struvite (CPST), triple superphosphate (TSP), monoammonium phosphate (MAP), and a control in six soils from Arkansas (AR; loam [L] and silt loam [SiL]), Missouri (MO; SiL 1 and SiL 2), and Nebraska …
Weed Control And Rice Response To Microencapsulated Acetochlor And A Fenclorim Seed Treatment On A Clay Soil, Tristen H. Avent, Jason K. Norsworthy
Weed Control And Rice Response To Microencapsulated Acetochlor And A Fenclorim Seed Treatment On A Clay Soil, Tristen H. Avent, Jason K. Norsworthy
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Recent research has demonstrated the ability of a fenclorim seed treatment to reduce rice (Oryza sativa L.) injury to acetochlor. However, all studies were conducted on silt loam soils and have not evaluated rice tolerance or weed control on clay soils. Experiments were initiated in 2021 and 2022 at the Northeast Research and Extension Center near Keiser, AR, to determine rice response and the effectiveness of delayed-preemergence (DPRE)-applied microencapsulated (ME) acetochlor (1.1, 1.7, and 2.3 lb ai acre−1) when applied to a clay soil with and without a fenclorim seed treatment at 0 or 2.5 lb ai …