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Articles 1 - 30 of 192
Full-Text Articles in Agronomy and Crop Sciences
Soil Structure And Organic Carbon Dynamics From Agroforestry And Conventional Coffee Systems In A Clayey Oxisol, Helen C.S. Amorium, Franciane D. Cogo, Rodrigo L. Cunha, Carols A. Silva, Amanda Ashworth, Yuri L. Zinn
Soil Structure And Organic Carbon Dynamics From Agroforestry And Conventional Coffee Systems In A Clayey Oxisol, Helen C.S. Amorium, Franciane D. Cogo, Rodrigo L. Cunha, Carols A. Silva, Amanda Ashworth, Yuri L. Zinn
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Agroforestry systems can enhance C retention in soils, nutrient cycling, and biodiversity, helping offset soil and water degradation commonly associated with monocultures. However, impacts of agroforestry on soil organic carbon and water retention are variable and remain largely understudied for tropical soils and coffee (Coffea arabica L.) systems. This study assessed soil organic C (SOC), soil structure, and particulate organic matter C (POM-C) in a gibbsitic Oxisol under conventional coffee (CC), coffee + macadamia [Macadamia integrifolia Maiden & Betche (CM)] agroforestry, no-till (NT) soybean [Glycine max (L.) Merr.]-corn (Zea mays L.), and a secondary forest succession (SF) as a control. …
Gas-Flux-Determination-Method Effects On Greenhouse Gas Emissions Andglobal Warming Potential From Soybean In Southeast Arkans, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Gas-Flux-Determination-Method Effects On Greenhouse Gas Emissions Andglobal Warming Potential From Soybean In Southeast Arkans, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Greenhouse gas (GHG) research and quantification have increased in importance recently due to climate change. Non-flow-through chamber systems collect large quantities of gas concentration data to determine the gas flux, but gas-flux-determination (GFD) methods can vary between regression models, how negative fluxes are considered, and what agroecosystem is evaluated, which makes selecting an analysis method complicated. The objective of this study was to evaluate the effects of GFD method [i.e. linear (L) and exponential (E) regression models, with negative fluxes (WNF) and with reassigned negative fluxes (RNF)] on GHG fluxes, emissions, and global warming potential (GWP) from soybean (Glycine max) …
Short-Term Tillage Effects On Greenhouse Gas Emissions And Global Warming Potential From Soybean In Southeast Arkansas, Lauren Gwaltney, Kristofor R. Brye, Della Lunga Diego, Jonathan B. Brye, Trenton Roberts, Samuel B. Fernandes, Michael B. Daniels
Short-Term Tillage Effects On Greenhouse Gas Emissions And Global Warming Potential From Soybean In Southeast Arkansas, Lauren Gwaltney, Kristofor R. Brye, Della Lunga Diego, Jonathan B. Brye, Trenton Roberts, Samuel B. Fernandes, Michael B. Daniels
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Reduced tillage (RT) is a common conservation agriculture practice, generally regarded to be a valuable greenhouse gas (GHG) mitigation approach through increasing soil carbon (C) stocks. However, direct GHG measurements from RT compared to conventional tillage (CT) treatments can vary greatly depending on site-specific soil properties and management practices. The objective of this study was to evaluate the short-term effects of RT on soil-to-atmosphere carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes and emissions, global warming potential (GWP), yield, and emissions intensity (EI) throughout the 2024 soybean (Glycine max) growing season in a southeast Arkansas production field. Bulk …
Identifying Stable Parental Lines For Stripe Rust Resistance In Soft Red Winter Wheat, Ehsan Shakiba, David Moon
Identifying Stable Parental Lines For Stripe Rust Resistance In Soft Red Winter Wheat, Ehsan Shakiba, David Moon
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Stripe rust, caused by Puccinia striiformis f. sp. tritici, continues to be a major challenge in soft red winter wheat (SRWW) production, especially in the southern United States. In this area, mild winters and wet springs frequently lead to early and severe disease outbreaks. Although many lines demonstrate resistance in a single season, that resistance often does not last across multiple years. For breeding programs, this variability makes it hard to identify truly reliable lines. In this study, we evaluated 111 SRWW breeding lines over three consecutive growing seasons (2021-2024) under artificial inoculation in field conditions in Fayetteville, Arkansas. Stripe …
Season-Long Time-Series Analysis Of Soil Respiration In Furrow-Irrigated Corn With And Without Cover Crop In The Lower Mississippi River Basin, Diego Della Lunga, Kristofor Brye, Michael J. Mulvaney, Mike Daniels, Tabata De Oliveira, Beth Baker, Timothy Bradford, Chandler Arel
Season-Long Time-Series Analysis Of Soil Respiration In Furrow-Irrigated Corn With And Without Cover Crop In The Lower Mississippi River Basin, Diego Della Lunga, Kristofor Brye, Michael J. Mulvaney, Mike Daniels, Tabata De Oliveira, Beth Baker, Timothy Bradford, Chandler Arel
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Temporal resolution of carbon dioxide (CO2) release from the soil at the field scale is not completely understood. The objectives of this study were to identify trends, repetitive cycles, and residual patterns and structures with a time-series analysis from a furrow-irrigated corn (Zea mays L.) field with and without cover crops (i.e., CC and No-CC, respectively) over the course of one growing season in the Lower Mississippi River Basin. Carbon dioxide fluxes were measured from 5 May to 18 August 2024, four times a day (i.e., 0300, 0900, 1500, and 2100 h) from each of the two CC treatments. Linear …
Integration Of Marker-Assisted And Field Selection In Developing Tgms Lines For Hybrid Rice In The Southern United States, Ehsan Shakiba, Dustin G. North
Integration Of Marker-Assisted And Field Selection In Developing Tgms Lines For Hybrid Rice In The Southern United States, Ehsan Shakiba, Dustin G. North
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Hybrid rice adoption in the southern United States, especially Arkansas, requires thermo-sensitive genic male sterile (TGMS) lines that combine stable sterility with glabrous foliage and grain quality preferred in U.S. markets. Over seven years (2014–2021), three TGMS lines—UAS3023, UAS20, and UAS4208—were developed through integration of marker-assisted and field-based selection targeting blast resistance (Pi-ta, Pi-b), semi-dwarf stature (sd1), amylose content, and gelatinization temperature. UAS3023 and UAS20 expressed ≥ 99% sterility at ~ 29 °C, while UAS4208 was sterile at ~ 32 °C, thresholds consistent with controlled-environment studies. All lines showed semi-dwarf stature, lodging resistance, glabrous leaves, and ~ …
Recycling Waste Via Insect Agriculture: Frass Impacts On Soil And Plant Health, Helen C.S. Amorim, Amanda J. Ashworth, Thomas F. Ducey, Valerie B. Brewer-Gunsaulis, Gerson L. Drescher, Philip R. Owens, Alana H. Patterson, Giovanna De Blais, Iris Van Straaten
Recycling Waste Via Insect Agriculture: Frass Impacts On Soil And Plant Health, Helen C.S. Amorim, Amanda J. Ashworth, Thomas F. Ducey, Valerie B. Brewer-Gunsaulis, Gerson L. Drescher, Philip R. Owens, Alana H. Patterson, Giovanna De Blais, Iris Van Straaten
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Frass-the main by-product of insect rearing for animal feed-is emerging as a promising soil amendment and plant growth promoter. However, basic agronomic information is lacking and prevents frass' widespread use as a biofertilizer. This study assessed impacts of black soldier fly (Hermetia illucens L. [Diptera: Stratiomyidae]) frass on soil fertility, crop growth, and quality compared to poultry litter (PL). Irrigated and non-irrigated soybean (Glycine max L. Merr.) and non-irrigated switchgrass (Panicum virgatum L.) plots received either PL (5.6 Mg ha(-1)), low frass rate (LF; 5.6 Mg ha(-1)), high frass rate (HF; 11.2 Mg ha(-1)), besides the unamended control (CT). In …
Use Of Growing Degree Days To Model The Dynamics Of Aboveground Biomass And Nitrogen Accumulation Of Winter Cover Crops, M. Pessotto, Trenton Roberts, C. Dos Santos, K. A. Hoegenauer, M. Bertucci, W. J. Ross, M. Savin
Use Of Growing Degree Days To Model The Dynamics Of Aboveground Biomass And Nitrogen Accumulation Of Winter Cover Crops, M. Pessotto, Trenton Roberts, C. Dos Santos, K. A. Hoegenauer, M. Bertucci, W. J. Ross, M. Savin
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Cover cropping is an important management practice that can benefit the cash crop and the environment. Plant species, weather, and cover crop termination influence biomass production and N fixation potential. This study was conducted to determine optimal termination dates for production systems in Arkansas based on growing degree days (GDD) for eight different cover crop species: Austrian winter pea (AWP) (Pisum sativum), balansa clover (Trifolium michelianum), barley (Hordeum vulgare), black-seeded oats (Avena sativa), common vetch (Vicia sativa var. Cahaba), cereal rye (Secale cereale), crimson clover (Trifolium incarnatum), and hairy vetch (Vicia villosa). Field studies were conducted at three research stations …
Fluridone Use In Furrow-Irrigated Rice: Palmer Amaranth Control And Crop Response, Maria Carolina Souza, Jason K. Norsworthy, Pamela Carvalho-Moore, Amar S. Godar, Samuel B. Fernandes, Trenton L. Roberts, Thomas R. Butts
Fluridone Use In Furrow-Irrigated Rice: Palmer Amaranth Control And Crop Response, Maria Carolina Souza, Jason K. Norsworthy, Pamela Carvalho-Moore, Amar S. Godar, Samuel B. Fernandes, Trenton L. Roberts, Thomas R. Butts
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Rice cultivated under furrow irrigation faces weed management challenges due to the aerobic conditions that favor the emergence of terrestrial weeds such as Palmer amaranth. Fluridone was recently registered for use in rice production, offering an alternative site of action for Palmer amaranth control. Four site-years of field experiments were conducted in 2022 and 2023 in furrow-irrigated rice to assess Palmer amaranth control and crop tolerance to fluridone applied preemergence alone or with various postemergence treatments. The experiment was a randomized complete block design with a split-plot arrangement and four replications. The whole-plot factor was the postemergence treatment, while the …
Ferrihydrite Level In Paddy Soil Affects Inorganic Arsenic Species In Rice Grains, Arindam Malakar, Daniel D. Snow, Michael Kaiser, Harkamal Walia, Trenton L. Roberts, Chittaranjan Ray
Ferrihydrite Level In Paddy Soil Affects Inorganic Arsenic Species In Rice Grains, Arindam Malakar, Daniel D. Snow, Michael Kaiser, Harkamal Walia, Trenton L. Roberts, Chittaranjan Ray
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Rice is consumed by similar to 50% of the global population, grown primarily in flooded paddy fields, and is susceptible to arsenic accumulation. Inorganic arsenic, particularly in reduced form (As(iii)), is considered the most toxic and is more likely to accumulate in rice grains under flooded systems. We postulate that increased levels of highly reactive iron minerals, such as ferrihydrite, in paddy soils can regulate the bioavailability of arsenic and reduce its uptake by priming iron plaque formation. To clarify, two rice varieties, Norin and Sabharaj, differing in arsenic uptake rate, were grown in paddy soil under flooded conditions with …
Twenty-Four Year Record Reveals Increasing Discharge In Tributaries To A Key Drinking Water Resource, Shannon Speir, Ireyra G. Tamayo, Alana G. Strauss
Twenty-Four Year Record Reveals Increasing Discharge In Tributaries To A Key Drinking Water Resource, Shannon Speir, Ireyra G. Tamayo, Alana G. Strauss
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Climate change is altering precipitation patterns worldwide, yielding changes in streamflow and water availability. Increases in storm frequency and intensity, as well as prolonged droughts, may alter the timing and magnitude of flow and nutrient delivery to downstream systems, many of which serve as key drinking water resources. Thus, we must understand long-term changes in streamflow to protect drinking water supplies. Here, we document changes in streamflow delivery to Beaver Lake Reservoir, the key drinking water source in rapidly urbanising Northwest Arkansas. We used publicly available data to analyse flow records in four key tributaries to Beaver Lake from 2000 …
Preliminary Investigation Of Nitrogen Rate Influence On Irrigated Bermudagrass Forage Production, Bronc Finch, Lance Blythe
Preliminary Investigation Of Nitrogen Rate Influence On Irrigated Bermudagrass Forage Production, Bronc Finch, Lance Blythe
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Bermudagrass (Cynodon dactylon) forage production recommendations are often developed in natural environments with available water limitations, often resulting in highly variable responses and lower average responses. As farmland ownership changes and agriculture and irrigation technologies become more affordable the amount of irrigated hay production has increased. While much of the agronomic management does not differ between rain-fed and irrigated environments, nutrient use and uptake dynamics may. This requires a reevaluation and potential adjustment of current recommendations to allow for increased yield potential of irrigated production systems without detrimental impacts on the system. The objective of this study was to identify …
Genomic Prediction And Association Mapping Of Early Season Flood Tolerance In Soybean, Caio Canella Vieira, Chengjun Wu, Derrick Harrison, Rafael Marmo, Liliana Florez-Palacios, Andrea Acuna, Daniel Rogers, Samuel B. Fernandes, Igor Fernandes, Grover Shannon, Heng Ye, Henry T. Nguyen
Genomic Prediction And Association Mapping Of Early Season Flood Tolerance In Soybean, Caio Canella Vieira, Chengjun Wu, Derrick Harrison, Rafael Marmo, Liliana Florez-Palacios, Andrea Acuna, Daniel Rogers, Samuel B. Fernandes, Igor Fernandes, Grover Shannon, Heng Ye, Henry T. Nguyen
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Flooding has become a major threat to soybean [Glycine max (L.) Merr.] production as the frequency and intensity of extreme precipitations have been increasing due to climate change. While advances have been made in identifying soybean genetic resources and genomic regions associated with mid-season flood tolerance, there is limited understanding of early season flood tolerance at the vegetative growth stages V2/V4. This study aimed to identify genomic regions associated with early season flood tolerance using a diverse panel of 254 soybean accessions, as well as investigate the viability of implementing genomic prediction models for flood tolerance. Field trials were conducted …
Effect Of Crop Density On Palmer Amaranth (Amaranthus Palmeri) Emergence And Weed Density Interference Potential In A Furrow-Irrigated Rice System, Tanner Austin King, Jason K. Norsworthy, Thomas R. Butts, Sam Fernandes, Gerson L. Drescher
Effect Of Crop Density On Palmer Amaranth (Amaranthus Palmeri) Emergence And Weed Density Interference Potential In A Furrow-Irrigated Rice System, Tanner Austin King, Jason K. Norsworthy, Thomas R. Butts, Sam Fernandes, Gerson L. Drescher
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
There is a high demand for cultural weed management strategies targeting Palmer amaranth (Amaranthus palmeri S. Watson) in furrow-irrigated rice (Oryza sativa L.) production due to overreliance on herbicides and the lack of a continual flood to prevent weed emergence. Amaranthus palmeri has been shown to reduce corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] yields when it interferes with the crop. However, minimal research has been conducted to assess the ability of this weed species to impact rice grain yield. The manipulation of rice seeding rate to enhance rice canopy formation and favor …
Genetic Variability In Biomass Partitioning And Surface Residue Carbon-Nitrogen Ratios In Soybean, Joscif G. Raigne, Race H. Higgins, Elvis F. Elli, Sotirios V. Archontoulis, Somak Dutta, Fernando C. Miguez, Asheesh K. Singh
Genetic Variability In Biomass Partitioning And Surface Residue Carbon-Nitrogen Ratios In Soybean, Joscif G. Raigne, Race H. Higgins, Elvis F. Elli, Sotirios V. Archontoulis, Somak Dutta, Fernando C. Miguez, Asheesh K. Singh
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
The drive to increase seed yield in soybean [Glycine max (L.) Merr.] has traditionally overshadowed the exploration of biomass partitioning and the compositional characteristics of plant residue traits such as leaves, petioles, stems, and pods. The exploration of biomass partitioning and the compositional characteristics of plant residue traits in soybean provide insights into plant nutrient allocation strategies that can be utilized to increase crop productivity and improve management practices for maximizing yields and sustainability. Recognizing this gap, our study aimed to investigate the variability in these traits across 32 genetically diverse soybean genotypes cultivated over 2 years in central Iowa. …
Meta-Analytic Insights On Cover Crop Weed Suppression In The Midsouthern United States, Amar S. Godar, Jason K. Nprsworthy
Meta-Analytic Insights On Cover Crop Weed Suppression In The Midsouthern United States, Amar S. Godar, Jason K. Nprsworthy
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Herbicide resistance poses an escalating challenge to successful weed management in contemporary cropping systems, prompting growing interest in integrated strategies to reduce reliance on herbicides. Although cover cropping has long been recognized for its potential to suppress weeds, it has recently gained renewed attention as a weed management tool and for its ability to help producers achieve broader goals of soil health and environmental sustainability. Although research on its efficacy in the midsouthern United States has accumulated, a meta-analytic synthesis has been lacking. This meta-analysis synthesized 746 effect sizes from 27 peer-reviewed studies (selected based on explicit reporting of weed …
Hyperspectral Indicators And Characterization Of Glyphosate-Induced Stress In Common Lambsquarters (Chenopodium Album L.), Mario Soto, Aurelie M. Poncet, Nilda Roma-Burgos, O. Wesley France, Juan C. Velasquez, Amanda J. Ashworth, Kristofor R. Brye, Cengiz Koparan
Hyperspectral Indicators And Characterization Of Glyphosate-Induced Stress In Common Lambsquarters (Chenopodium Album L.), Mario Soto, Aurelie M. Poncet, Nilda Roma-Burgos, O. Wesley France, Juan C. Velasquez, Amanda J. Ashworth, Kristofor R. Brye, Cengiz Koparan
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Hyperspectral sensors are increasingly used to develop optimized vegetation indices (VIs) that capture plant spectral response to specific stressors. The project goal was to develop quantitative metrics for characterization of weed response to herbicide application. This work applied hyperspectral sensing to describe and predict the spectral response of common lambsquarters (Chenopodium album L., CHEAL) to glyphosate application. Thirteen treatments, including one glyphosate rate used alone or in combination with eleven adjuvants plus one non- treated control, were applied to CHEAL seedlings cultivated in a greenhouse. Visible injury ratings and non- imaging hyperspectral data were collected 14 days after treatment application. …
Biochar Type And Rate Effects On Greenhouse Gas Emissions Fromfurrow-Irrigated Rice, Lauren Gwaltney, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Samuel B. Fernandes, Mike B. Daniels
Biochar Type And Rate Effects On Greenhouse Gas Emissions Fromfurrow-Irrigated Rice, Lauren Gwaltney, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Samuel B. Fernandes, Mike B. Daniels
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Biochar is a relatively new, potential climate-mitigation strategy, but biochar still requires investigation regarding biochar's ability to reduce greenhouse gas (GHG) emissions. Little research has been conducted to quantify the impacts of biochar on GHG production from upland (i.e., furrow-irrigated) rice (Oryza sativa) production systems. The objective of this study was to evaluate the effects of wood biochar type (powder and coarse particle size) and application rate (0, 2.5, and 5 Mg ha-1) on GHG emissions in greenhouse-grown, simulated furrow-irrigated rice grown in a silt-loam soil. Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes were measured weekly throughout …
Evaluation Of Greenhouse Gas-Flux-Determination Models And Calculation In Southeast Arkansas Cotton Production, Cassandra Seuferling, Kristofor Brye, Diego Della Lunga, Jonathan Brye, Michael Daniels, Lisa Wood, Kelsey Greub
Evaluation Of Greenhouse Gas-Flux-Determination Models And Calculation In Southeast Arkansas Cotton Production, Cassandra Seuferling, Kristofor Brye, Diego Della Lunga, Jonathan Brye, Michael Daniels, Lisa Wood, Kelsey Greub
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Greenhouse gas (GHG) emissions evaluations from agroecosystems are critical, particularly as technology improves. Consistent GHG measurement methods are essential to the evaluation of GHG emissions. The objective of the study was to evaluate potential differences in gas-flux-determination (GFD) options and carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes and growing-season-long emissions estimates from furrow-irrigated cotton (Gossypium hirsutum) in southeast Arkansas. Four GFD methods were evaluated [i.e., linear (L) or exponential (E) regression models, with negative fluxes (WNF) included in the dataset or replacing negative fluxes (RNF)] over the 2024 growing season using a LI-COR field-portable chamber and gas …
Temporal Changes In Soil Organic Carbon And Other Near-Surfacesoil Properties Under Native Tallgrass Prairie In The Arkansasriver Valley, Katie Jansson, Kristofor R. Brye, Mike Richardson, Lisa S. Wood
Temporal Changes In Soil Organic Carbon And Other Near-Surfacesoil Properties Under Native Tallgrass Prairie In The Arkansasriver Valley, Katie Jansson, Kristofor R. Brye, Mike Richardson, Lisa S. Wood
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
One climate-change mitigation pathway is soil carbon (C) sequestration. Native prairies have long been known for their soil C sequestration abilities, but the full extent of their sequestration capacity is not completely understood, particularly across diverse regions. This study evaluated the effects of soil depth and soil map unit-prairie combination on changes in various soil properties from 2018 to 2022 in the top 20 cm of two native tallgrass prairies in west-central Arkansas. Soil bulk density, pH, electrical conductivity, total nitrogen, total C (TC), soil organic matter (SOM), and Mehlich-3 extractable soil nutrients were evaluated from the 0- to 10-cm …
Crop Response To Simulated Diflufenican Carryover And Sprayer Contamination With A Diflufenican Premixture, Matthew C. Wooland, Jason K. Norseworthy, L. Tom Barber, Trenton L. Roberts, Benjamin C. Trash, Leonard B. Piveta, Amar S. Godar
Crop Response To Simulated Diflufenican Carryover And Sprayer Contamination With A Diflufenican Premixture, Matthew C. Wooland, Jason K. Norseworthy, L. Tom Barber, Trenton L. Roberts, Benjamin C. Trash, Leonard B. Piveta, Amar S. Godar
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Palmer amaranth [Amaranthus palmeri (S.) Wats] has evolved resistance to nine sites of action (SOAs) globally, leaving producers searching for effective herbicide options. Bayer CropScience has announced intentions to launch a series of Convintro (TM) brand herbicides, one of which will be a premixture including diflufenican, metribuzin, and flufenacet for preemergence use in soybean [Glycine max (L.) Merr]. Diflufenican is a WSSA group 12 herbicide that would add a new SOA for soybean producers. With the anticipated launch of the premixture, research is needed to evaluate the potential for diflufenican carryover or tank contamination from a diflufenican premixture to injure …
A Vacuolar Proton Pump Controls The Post-Germinative Growth Of Rice (Oryza Sativa Ssp. Japonica), Peter James Icalia Gann, Soumen Nandy, Rodrigo Botelho, Kari Vinzant, Mariya Khodakovskaya, Vibha Srivastava
A Vacuolar Proton Pump Controls The Post-Germinative Growth Of Rice (Oryza Sativa Ssp. Japonica), Peter James Icalia Gann, Soumen Nandy, Rodrigo Botelho, Kari Vinzant, Mariya Khodakovskaya, Vibha Srivastava
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Post-germinative growth in plants is controlled by sucrose mobilization from the endosperm. Regulation of this process, however, is not fully understood. Transcriptional suppression of the rice vacuolar H+ translocating pyrophosphatase (V-PPase) referred to as VPP5 led to enhanced starch content in mature grains. However, vpp5 suppressed lines displayed a slower post-germinative growth rescuable by sucrose, indicating inefficient sucrose mobilization from the endosperm. Biochemical and gene expression analyses showed a slower rate of starch to sucrose conversion and altered expression of the key starch utilization pathway genes. We hypothesized that the modulation of metabolic activities in the vpp5 lines was based …
Integrating Cover Crops And Targeted Herbicide Applications In Cotton Production, Tristen H. Avent, Jason K. Norsworthy, Gerson L. Drescher
Integrating Cover Crops And Targeted Herbicide Applications In Cotton Production, Tristen H. Avent, Jason K. Norsworthy, Gerson L. Drescher
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Cover crops are part of integrated weed control management to help mitigate herbicide resistance evolution. Targeted sprays from the John Deere See & Spray are currently not recommended in cover crops. Experiments were conducted yearly from 2022 to 2024 in Keiser, AR, to evaluate targeted applications (TAs) with cover crops in cotton (Gossypium hirsutum L.). Treatments assessed the main effect of winter cover crop (fallow, cereal rye [Secale cereale L.], or hairy vetch [Vicia villosa Roth]), herbicide application methods (nontreated, broadcast [BC], TA + BC residuals [TA + BCRs], or TA only), and the interaction on cotton tolerance, weed control, …
Cover-Crop Effects On Near-Surface Soil Physical Properties,Infiltration, And Nematodes Over Time In The Lower Mississippiriver Valley, Cooper Fanning, Kristofor R. Brye, Mike Daniels, Trenton L. Roberts, Sam Fernandes, Lisa Wood
Cover-Crop Effects On Near-Surface Soil Physical Properties,Infiltration, And Nematodes Over Time In The Lower Mississippiriver Valley, Cooper Fanning, Kristofor R. Brye, Mike Daniels, Trenton L. Roberts, Sam Fernandes, Lisa Wood
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Human population growth and climate change are stressors that continue to put pressure on current agricultural production systems. Cover crops (CC) as a means to improve soil health remain widely underused, particularly in the Lower Mississippi River Valley. The objective of this study was to evaluate the effects of CC on the change over time in near-surface bulk density, aggregate stability, total infiltration and steady-state infiltration rate, and nematode populations in eastern Arkansas. Averaged across depth, bulk density did not change over time under a no cover crop (NCC) treatment, but increased approximately 0.03 g cm-3 over time under CC. …
Registration Of High Yield Conventional Soybean 'S17-2193' With Resistance To Multiple Diseases, Francia Seconde Ravelombola, Yi-Chen Lee, Donghun Lee, Caio C. Vieira, Alemu Mengistu, Lin Feng, Grover Shannon
Registration Of High Yield Conventional Soybean 'S17-2193' With Resistance To Multiple Diseases, Francia Seconde Ravelombola, Yi-Chen Lee, Donghun Lee, Caio C. Vieira, Alemu Mengistu, Lin Feng, Grover Shannon
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
'S17-2193' (Reg. no. CV-565, PI 707954) is a high-yielding late maturity group IV (relative maturity of 4.7), conventional soybean [Glycine max (L.) Merr.] cultivar developed and released in 2022 by the University of Missouri Fisher Delta Research, Extension, and Education Center. S17-2193 was tested in over 88 environments (40 environments for preliminary, advanced, cooperative and uniform tests; and 48 environments for soybean state variety tests) from 2018 to 2021 in 10 states: Alabama, Arkansas, Illinois, Kansas, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, and Tennessee. Results showed that S17-2193 was well adapted across the mid-South United States. This soybean cultivar has …
Registration Of 'R19c-1012': A High-Yielding Soybean Cultivar With Improved Flooding Tolerance At Early Vegetative Stages, Caio Canella Vieira, Rafael Marmo, C. Wu, Liliana Florez-Palacios, Andrea Acuna, D. Harrison, D. Rogers, Leandro Mozzoni, T. Roberts, J. F. Carlin, Travis Faske, F. Lin, G. Shannon, H. T. Nguyen
Registration Of 'R19c-1012': A High-Yielding Soybean Cultivar With Improved Flooding Tolerance At Early Vegetative Stages, Caio Canella Vieira, Rafael Marmo, C. Wu, Liliana Florez-Palacios, Andrea Acuna, D. Harrison, D. Rogers, Leandro Mozzoni, T. Roberts, J. F. Carlin, Travis Faske, F. Lin, G. Shannon, H. T. Nguyen
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
'R19C-1012' (Reg. no. CV-564, PI 707837) is a high-yielding, conventional maturity group Mid-IV (Relative maturity 4.6) soybean [Glycine max (L.) Merr.] cultivar with improved flooding tolerance at V2-V4 vegetative growth stages. It was developed and released by the University of Arkansas System-Division of Agriculture Research & Extension Center in 2024. R19C-1012 has an indeterminate growth habit, purple flowers, gray pubescence, brown pods, and seed with an imperfect black hilum. From 2019 to 2023, R19C-1012 was evaluated across 40 irrigated environments, with an average grain yield of 4302 kg ha-1, representing 93% and 99% relative yield of the Xtend and non-Xtend …
Yield And Economics Following 5 Years Of Integrated Weed Management In Cotton, Amar Godar, Jason K. Norseworthy, L. Tom Barber, Roger Farr, Ty Smith
Yield And Economics Following 5 Years Of Integrated Weed Management In Cotton, Amar Godar, Jason K. Norseworthy, L. Tom Barber, Roger Farr, Ty Smith
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
The implementation of integrated weed management (IWM) practices in conventional management systems involves additional costs and can influence both short-term and long-term cotton (Gossypium hirsutum L.) yields, ultimately affecting economic viability. This study, conducted from fall 2018 to fall 2023 near Marianna, AR, evaluated four IWM practices in a large-plot, fixed-plot factorial design: zero tolerance for weed seed rain, soil inversion deep tillage every third year in the fall, a preplant terminated cereal rye cover crop, and dicamba-resistant cotton technology. Long-term economic impacts were assessed using the 5-year average cost-adjusted yield, with the base program (excluding all IWM practices) serving …
Cover Crop Effects On Greenhouse Gas Emissions And Global Warming Potential In Furrow-Irrigated Corn In The Lower Mississippi River Valley, Diego Della Lunga, Kristofor Brye, Michael J. Mulvaney, Mike Daniels, Tabata De Oliveira, Beth Baker, Timothy Bradford Jr, Chandler M. Arel
Cover Crop Effects On Greenhouse Gas Emissions And Global Warming Potential In Furrow-Irrigated Corn In The Lower Mississippi River Valley, Diego Della Lunga, Kristofor Brye, Michael J. Mulvaney, Mike Daniels, Tabata De Oliveira, Beth Baker, Timothy Bradford Jr, Chandler M. Arel
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Corn (Zea mays) production systems are described as high risk for emissions of greenhouse gases (GHG) due to large fertilizer inputs. Conservation practices, such as cover crop (CC), can limit the effects of agricultural activities on GHGs while increasing carbon and nitrogen storage. The objective of the study was to assess the effects of cover crops, i.e., with CC and no-CC, on GHG (i.e., CO2, CH4, and N2O) emissions and global warming potential (GWP) in furrow-irrigated corn in the Lower Mississippi River Valley. Gas sampling was conducted with an automated system that measured GHGs four times daily during the 2024 …
Rice Tolerance To Fluridone At Different Application Timings And In Mixtures With Commonly Used Herbicides, Maria Carolina Souza, Jason K. Norsworthy, Thomas R. Butts, Robert Scott
Rice Tolerance To Fluridone At Different Application Timings And In Mixtures With Commonly Used Herbicides, Maria Carolina Souza, Jason K. Norsworthy, Thomas R. Butts, Robert Scott
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Introducing new herbicides requires a comprehensive understanding of how crops respond to various herbicide-related factors. Fluridone was registered for use in rice production in 2023, but research on rice tolerance to this herbicide is lacking. Hence, field research aimed to 1) evaluate the effect of fluridone application timing on rice tolerance and 2) assess rice response to fluridone in a mixture with standard rice herbicides applied to 3-leaf rice. Both experiments were conducted in a delay-flooded dry-seeded system using a randomized complete block design, with four replications. Treatments in the first experiment included a nontreated control and 10 application timings, …
Greenhouse Gas Emissions From Flood-Irrigated Rice As Affected By Phosphorus Fertilizer Source, Chandler M. Arel, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Richard Adams
Greenhouse Gas Emissions From Flood-Irrigated Rice As Affected By Phosphorus Fertilizer Source, Chandler M. Arel, Kristofor R. Brye, Diego Della Lunga, Trenton L. Roberts, Richard Adams
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Research into alternative phosphorus (P) fertilizer sources that may be able to supplement P resources is necessary. Struvite (MgNH4PO4 · 6H2O) can be made by removing excess nutrients from waste sources and may reduce greenhouse gas (GHG) emissions from cropping systems. This study sought to quantify GHG [i.e., methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2)] fluxes, season-long emissions, and net GHG emissions from chemically precipitated struvite (CPST) and synthetic and real-wastewater-derived electrochemically precipitated struvite (ECST) compared to monoammonium phosphate (MAP) and an unamended control (UC) from flood-irrigated rice (Oryza sativa) grown in P-deficient, silt loam soil in a …