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Articles 1231 - 1260 of 1783
Full-Text Articles in Agricultural Science
Study On Course Of Germinating, Seedling And Developing Of Ceratoides Seeds, Kurban Nizamidin, Israyil Barat
Study On Course Of Germinating, Seedling And Developing Of Ceratoides Seeds, Kurban Nizamidin, Israyil Barat
IGC Proceedings (1977-2023)
No abstract provided.
The Effect Of Chemical Scarification And Washing On The Germination Of Ferula Ovina Seeds, H. R. Keshtkar, F. Mellati
The Effect Of Chemical Scarification And Washing On The Germination Of Ferula Ovina Seeds, H. R. Keshtkar, F. Mellati
IGC Proceedings (1977-2023)
No abstract provided.
Varietal Difference In The Pre‐Germination Flooding Tolerance Of Commercial Cultivars Of Silage Corn And The Availability Of A Ridge‐Making Seeder For The Avoidance Of Wet Injury To Corn Seeds, Tsutomu Kanno, Souichiro Morita, Shunji Kurokawa, Setsuro Sato, Yoshiro Mano, Toshihiko Ibuki, Noritoshi Sumida, Hidehiko Inoue, Seiji Nakao, Hisashi Hosokawa
Varietal Difference In The Pre‐Germination Flooding Tolerance Of Commercial Cultivars Of Silage Corn And The Availability Of A Ridge‐Making Seeder For The Avoidance Of Wet Injury To Corn Seeds, Tsutomu Kanno, Souichiro Morita, Shunji Kurokawa, Setsuro Sato, Yoshiro Mano, Toshihiko Ibuki, Noritoshi Sumida, Hidehiko Inoue, Seiji Nakao, Hisashi Hosokawa
IGC Proceedings (1977-2023)
No abstract provided.
Effects Of Storage Conditions On The Germinability Of Seeds Of Three Different Browse Plants, Alaba O. Jolaosho
Effects Of Storage Conditions On The Germinability Of Seeds Of Three Different Browse Plants, Alaba O. Jolaosho
IGC Proceedings (1977-2023)
No abstract provided.
Raising Seedling Of Longstalk Peach, Ming Jia, Gele Qing, Yuzhi Wang
Raising Seedling Of Longstalk Peach, Ming Jia, Gele Qing, Yuzhi Wang
IGC Proceedings (1977-2023)
No abstract provided.
The Role Of The Lens In Controlling Physical Dormancy Breakdown In Three Legume Species, X. W. Hu, Yanrong Wang
The Role Of The Lens In Controlling Physical Dormancy Breakdown In Three Legume Species, X. W. Hu, Yanrong Wang
IGC Proceedings (1977-2023)
No abstract provided.
Different Priming Treatments To Influence The Germination Of Atriplex L., Shengrong Hu, Dandan Zhou, Yong Gao
Different Priming Treatments To Influence The Germination Of Atriplex L., Shengrong Hu, Dandan Zhou, Yong Gao
IGC Proceedings (1977-2023)
No abstract provided.
Effect Of Drought Stress On The Viability Of Wild Lespedeza Dahurica Seeds, Zhibing Hou, Xiang Zhao, Zhiming Bai
Effect Of Drought Stress On The Viability Of Wild Lespedeza Dahurica Seeds, Zhibing Hou, Xiang Zhao, Zhiming Bai
IGC Proceedings (1977-2023)
No abstract provided.
Characterization, Incidence, And Epidemiology Of Two Novel Strawberry Rhabdoviruses, Ava Wait
Characterization, Incidence, And Epidemiology Of Two Novel Strawberry Rhabdoviruses, Ava Wait
Graduate Theses and Dissertations
Strawberry is the most important berry crop, grown in most temperate regions around the world. In the early 2000s and in 2012-2013, viral disease devastated strawberry production in California and Florida respectively; causing multimillion dollar losses. This occurred because viruses were moving in the field undetected. The modern strawberry (Fragaria x ananassa Duch.) is tolerant to single and double infections; yet when several viruses infect plants, symptoms as severe as plant death can occur. To prevent future epidemics, the use of virus-tested planting materials is essential. In 2019, rhabdovirus-like sequences were detected in strawberry using a combination of high-throughput sequencing …
The Influence Of Singlet Oxygen And Loss Of Function Of Fatty Acid Desaturase 7 In The Chloroplast On Aphid Resistance In Arabidopsis Thaliana, Hillary Donna Fischer
The Influence Of Singlet Oxygen And Loss Of Function Of Fatty Acid Desaturase 7 In The Chloroplast On Aphid Resistance In Arabidopsis Thaliana, Hillary Donna Fischer
Graduate Theses and Dissertations
Fatty Acid Desaturase 7 (FAD7) is a chloroplast-localized enzyme that alters the fatty acid content of photosynthetic membranes, and that negatively regulates plant defenses against aphids. Previous studies in the model organism Arabidopsis (Arabidopsis thaliana) have shown that loss-of-function mutations in FAD7 decrease population growth of the green peach aphid (GPA; Myzus persicae Sulzer). This study further characterized the effects of a fad7 null mutant on aphids, and investigated the role of reactive oxygen species (ROS), including singlet oxygen (1O2), in plant responses to aphid resistance in fad7 as well as in wild type plants and a mutant with heightened …
Resistance Screening And Association Mapping For Resistance To The Downy Mildew Pathogen Of Spinach, Dotun Olaoye
Resistance Screening And Association Mapping For Resistance To The Downy Mildew Pathogen Of Spinach, Dotun Olaoye
Graduate Theses and Dissertations
Spinach is an important cool leafy vegetable cultivated around the world, with large scale production in California and Arizona in the U.S. Spinach is a highly nutritious vegetable beneficial in the human diet. Spinach is affected by a number of biotic stressors. Downy mildew, caused by the oomycete pathogen Peronospora effusa, is a major threat to spinach as it affects the leaf quality and impacts the economic value of spinach. Several efforts have led to the development of resistant genotypes/cultivars to this pathogen. However, few studies have examined the genetics of resistance to the downy mildew pathogen in detail. This …
Long-Term Changes In Soil Surface Properties As Affected By Management Practices In A Wheat-Soybean, Double-Crop System, Machaela Morrison
Long-Term Changes In Soil Surface Properties As Affected By Management Practices In A Wheat-Soybean, Double-Crop System, Machaela Morrison
Crop, Soil and Environmental Sciences Undergraduate Honors Theses
Long-term agricultural sustainability and productivity are controlled by the integrative effects of different management practices on the soil. Many Arkansas producers use the double-crop system to grow soybeans [Glycine max (L.) Merr] and wheat (Triticum aestivum L.). Studying combinations of different, non-traditional, alternative agricultural techniques may help producers better understand the long-term implications of various management practice options on sustainability and productivity. The objective of this study was to evaluate the effects of agricultural management practices, including residue level, tillage, irrigation, and burning, and soil depth on the change in various soil properties from 2010 to 2020 in …
Baseline Sensitivity To Dmi Fungicides In Cercospora Spp. And Corynespora Spp. In Arkansas Soybeans, Evan Buckner
Baseline Sensitivity To Dmi Fungicides In Cercospora Spp. And Corynespora Spp. In Arkansas Soybeans, Evan Buckner
Crop, Soil and Environmental Sciences Undergraduate Honors Theses
Cercospora spp. and Corynespora spp. are two common foliar fungal pathogens in Arkansas amongst other soybean producing areas. Two primary diseases caused by Cercospora spp. are Cercospora Leaf Blight (CLB, caused mainly by C. kikuchii) and Frogeye Leaf Spot (C. sojina). Both diseases affect foliage, and when lesions collapse, leaves may fall prematurely resulting in yield loss. In the specific case of CLB, this is a disease on the rise since 2000, and also causes seed infection reducing seed quality. Target spot is a disease caused by Corynespora cassiicola, and is of less damaging for farmers in larger …
Does Integrating Crops With Livestock Production Impact Soil Properties And Crop Production?, Lindsey Anderson
Does Integrating Crops With Livestock Production Impact Soil Properties And Crop Production?, Lindsey Anderson
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Re-integrating crop and livestock production through cover crop (CC) and corn residue grazing could efficiently utilize resources and ensure profitability while improving environmental quality, but how this integration affects soils and crops is not well understood. We conducted two studies to address this. In the first study, we evaluated the impact of cattle (1.3-3.7 head ha-1) grazing an oat (Avena sativa L.) CC on soil and crop yields in two adjacent irrigated no-till corn (Zea mays L.)-soybean (Glycine max L.) fields on silt loam soils in eastern Nebraska. Field I was grazed twice, while Field …
Production, Evaluation, And Selection Of Elite Quality Protein Popcorn (Qpp) Hybrids, Leandra Marshall Parsons
Production, Evaluation, And Selection Of Elite Quality Protein Popcorn (Qpp) Hybrids, Leandra Marshall Parsons
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
In 2017, twelve Quality Protein Popcorn (QPP) inbred lines were developed and selected as premier dent by popcorn crosses fit for hybridization and testing. These QPP inbred lines were derived from specific Quality Protein dent Maize (QPM) by ConAgra Brands® popcorn line crosses to produce high lysine, vitreous popcorn lines capable of near-equal popping characteristics compared to the original popcorn parents. The QPP hybridization project commenced in the summer of 2018 utilizing these 12 inbred QPP lines and crossing them in a full diallel. Since then, the production of QPP hybrids has employed a diverse set of selection factors evaluating …
The Effect Of Anionic Surfactants On Herbicide Mixtures And Solutions, Ely Daniel Anderson
The Effect Of Anionic Surfactants On Herbicide Mixtures And Solutions, Ely Daniel Anderson
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Herbicide mixtures are popular for farmers to delay the evolution of herbicide-resistant biotypes from occurring and control existing herbicide-resistant weeds. Glufosinate is a contact herbicide that has been observed as a mixture partner with many herbicides. In many cases, antagonistic interactions have occurred when using glufosinate in mixture with other herbicides. The antagonistic interactions have resulted in applications with incomplete weed control. Adjuvants have been known to impact an herbicide application by increasing herbicide penetration, spreadability, and efficacy. Adjuvants added to glufosinate mixtures can impact spray applications and increase weed control. The objectives of this research were: (1) investigate the …
Light Intensity Control For Plc-Based Hydroponic Demonstration System, Christian Hitt
Light Intensity Control For Plc-Based Hydroponic Demonstration System, Christian Hitt
Biological and Agricultural Engineering Undergraduate Honors Theses
In order to demonstrate a skill set obtained through the University of Arkansas Biological Engineering, a group of students and I developed a hydroponic system where plants could be grown in a chamber. System parameters such as air quality, irrigation, and lighting were controlled by a Programmable Logic Computer (PLC) and an array of sensors and actuators. Each student focused on a certain aspect of this system, mine being the lighting. Developing this system involved researching the relationship between light intensity and plant growth, designing a system to suspend the lights above the growth chamber, and develop a system to …
Starter Nitrogen Source And Preflood Nitrogen Rate Effects On Rice Grown On Clay Soils, Linda Rachelle Martin
Starter Nitrogen Source And Preflood Nitrogen Rate Effects On Rice Grown On Clay Soils, Linda Rachelle Martin
Graduate Theses and Dissertations
Seedling rice (Oryza sativa L.) grown on clayey-textured soils generally develops slowly as compared to loamy-textured soils. Our research examined the effects of starter-N source and preflood-N rates on canopy closure, total aboveground N uptake, and grain yield of rice grown on clayey-textured soils. Eleven field trials were established in Arkansas and Mississippi including five trials with a hybrid cultivar and six trials using a pure-line cultivar. Starter-N sources included no starter-N (NONE), ammonium sulfate (AMS), diammonium phosphate (DAP), and urea (UREA) applied at 24 kg N ha-1 at the rice 2-leaf stage and five preflood-N rates ranging from 0-224 …
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation, Drew Dillon Kirkpatrick
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation, Drew Dillon Kirkpatrick
Graduate Theses and Dissertations
Cover crops have the potential to provide many benefits including weed suppression, erosion control, and improvements to soil quality. These benefits can be affected by species, biomass accumulation, and management practices. Although large amounts of biomass are good for maximizing benefits, it can result in problems for establishing the subsequent crop. Soybean [Glycine max (L.) Merr.] accounts for over 50% of Arkansas crop hectares annually; therefore, understanding the effect that a cover crop can have on the following soybean crop is crucial to the successful implementation of cover crops within the state. A study was established to evaluate winter cover …
Estimation Of Spatial Change In Cropland Area And Evaluation Of Irrigation Performance In Imperial Valley Using Remotely Sensed Data, Usha Poudel
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Imperial Valley (IV) in the US is an extensively irrigated agricultural region, which includes multiple crops changing on an annual and semiannual basis. The valley is facing grave concerns about water management due to its semi-arid environment, water intensive crops, and limited water supply. A simple, inexpensive, and repeatable method to detect changes in cropping patterns may assist irrigation managers to understand crop diversification and associated consumptive use. In addition, a spatial assessment of existing water irrigation system performance and productivity is crucial to benchmark and improve current water management strategies. This thesis estimates the spatial pattern of change …
Factors Affecting Irrigation Water Use In Southwest Missouri And Soil Microbial Response To Irrigation And Crop Residue, Shirley M. Dobbs
Factors Affecting Irrigation Water Use In Southwest Missouri And Soil Microbial Response To Irrigation And Crop Residue, Shirley M. Dobbs
Graduate Theses/Dissertations
Sustainable use of water resources in Southwest Missouri requires a better understanding of factors that influence groundwater use by crop producers. The objective of this study was to assess the influence of weather patterns and edaphic factors on water used for agricultural irrigation. Groundwater withdrawal data from 14 high-use agricultural irrigation wells were monitored between 2009 and 2016 as part of the Southwest Missouri Irrigation Project. Stepwise and linear regression was used to assess the relationship of weather and edaphic factors in response to annual water use from each well. Precipitation volume, number of precipitation events, average maximum and minimum …
Modeling The Growth And Establishment Of Plantation And Converted Silvopasture Systems In The Missouri Ozarks Region, Stewart James Mccollum
Modeling The Growth And Establishment Of Plantation And Converted Silvopasture Systems In The Missouri Ozarks Region, Stewart James Mccollum
Graduate Theses/Dissertations
The Missouri Ozarks are well known for high production in both timber products and cattle production. Most areas are also not well suited for many other agricultural practices such as row cropping, so forests and grazing lands dominate the landscapes. Such characteristics provide high potential for the agroforestry practice known as silvopasture. This study monitors the establishment of two different types of silvopasture systems, plantation and conversion types. In the plantation silvopasture, two cultivars of black walnut (Juglans nigra) were planted, Football and Kwikrop. Health and growth were monitored for those cultivars over the first year. The converted …
Effects Of Am Fungi From Conventional And No-Till Michigan Crop Fields On Plant And Soil Health, Derek Bennett
Effects Of Am Fungi From Conventional And No-Till Michigan Crop Fields On Plant And Soil Health, Derek Bennett
Masters Theses
Centuries of conventional till (CT) management in agriculture has depleted soil organic matter (SOM) by over 50%. While only comprising 5% in most soils, SOM provides soil with fertility and productivity. To compensate for SOM depletion, producers have been forced to increase their reliance on fertilizer and irrigation to maintain yields. In the coming decades, climate change is expected to challenge food production and threaten an already fragile system. With no remaining land left to cultivate, conservation management strategies such as no-till (NT) look to restore SOM and increase the resilience of food production for an ever growing, increasingly food …
Economic Feasibility Of Sub-Surfaced Poultry Litter, James Timothy Stults
Economic Feasibility Of Sub-Surfaced Poultry Litter, James Timothy Stults
Graduate Theses and Dissertations
Livestock producers routinely spread fertilizer or broadcast poultry litter to improve forage production. With poultry litter widely available across the Southeastern United States and a cheaper source of plant nutrition than fertilizer when proximal to application sites, the novel application of litter below the soil surface, while costly, allows for greater nutrient retention than broadcasting. Since quantifying costs and benefits of sub-surface litter application (SSLA) is complex, we develop and present a spreadsheet tool for automated comparison between SSLA, fertilizer, and broadcasted litter for user-specific scenarios involving equipment choices (new, used, custom), desired nutrient needs for crops grown, litter nutrient …
Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm
Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm
Graduate Theses and Dissertations
Weaknesses in the grades and standards system in low-income countries across Sub-Saharan Africa undermine the transparency of agricultural markets. In the Democratic Republic of the Congo (DRC), Ghana and Mozambique rice is predominately sold in open bags and if rice price does not reflect its quality, then inefficiencies may lead to consumer welfare losses. Importantly, it is possible that impoverished communities are priced out of the market due to inflated and inefficient prices. The objective of this study is to examine determinates of rice price by estimating the impact of selected rice quality attributes on rice prices in DRC, Ghana …
Crop Response To Low-Dose Dicamba, Mason Castner
Crop Response To Low-Dose Dicamba, Mason Castner
Graduate Theses and Dissertations
The introduction of dicamba-resistant (DR) soybean [Glycine max (L.) Merr.] and cotton (Gossypium hirsutum L.) followed by a label allowing over-the-top applications of dicamba in the 2017 provided growers an additional option for broadleaf weed control. Because non-DR soybean is sensitive to low concentrations of dicamba, postemergence dicamba applications present growers choosing to plant non-DR soybean with concerns of damage from off-target movement through physical drift and volatilization of the herbicide as well as tank-contamination from prior dicamba application. Consequences of low-dose dicamba exposure on sensitive vegetative and reproductive soybean have been well researched, but little is known regarding the …
Evaluation Of Irrigation And Nutrient Management Strategies In Rice Using Alternative Irrigation Methods, Justin Lee Chlapecka
Evaluation Of Irrigation And Nutrient Management Strategies In Rice Using Alternative Irrigation Methods, Justin Lee Chlapecka
Graduate Theses and Dissertations
As water resources gain value across the Mid-South, alternative irrigation strategies of rice (Oryza sativa L.) have garnered increasing attention. In 2015, an estimated 1.7% of Arkansas rice hectarage used alternate wetting and drying (AWD) irrigation and 0.9% used furrow irrigation. As of 2020, 2.5% used AWD and 16.9% used furrow irrigation, the latter accounting for near 99,000 ha in Arkansas. Little information exists in the scientific literature in relation to management of rice grown in the Mid-South without a conventional flood. This fact coupled with the rapid adoption rate, especially for furrow-irrigated rice (FIR), during the last five years …
Screening And Breeding Soybean For Flood Tolerance, Maria Roberta De Oliveira
Screening And Breeding Soybean For Flood Tolerance, Maria Roberta De Oliveira
Graduate Theses and Dissertations
Waterlogging can be detrimental to soybean [Glycine max (L.) Merr.] growth and development, with effects ranging from chlorosis and stunting to yield loss and plant death. Soybean responses to, and the effects of, waterlogging are dependent on the growth stage of the plant at the initiation of waterlogging. The objectives of this study were: (1) to assess the effectiveness of Genomic Selection (GS), Marker Assisted Selection (MAS) and Phenotypic Selection for flood tolerance at the progeny row stage as compared to random selection, for the development of high-yielding flood-tolerant lines; and (2) to compare field-screening and hydroponic greenhouse screening methodologies …
Rehabilitation Practices In Cocoa Agroforestry Systems Mitigate Outbreaks Of Termites And Support Cocoa Tree Development And Yield, Christian T.L. Djuideu, Hervé D.B. Bisseleua, Sévilor Kekeunou, Felicitas C. Ambele
Rehabilitation Practices In Cocoa Agroforestry Systems Mitigate Outbreaks Of Termites And Support Cocoa Tree Development And Yield, Christian T.L. Djuideu, Hervé D.B. Bisseleua, Sévilor Kekeunou, Felicitas C. Ambele
All Peer-Reviewed Publications
Most smallholder cocoa farmers in West Africa are not equipped with the necessary tools, techniques, and practices to rejuvenate their aging cocoa farms. Instead, they rather prefer to establish new cocoa farms at the expense of forest remnants. Poor management of their overaged farms has resulted in the emergence and outbreaks of new pest species such as termites feeding on the remaining productive trees and negatively affecting overall yield. We investigated how rehabilitation pruning of cocoa trees influences termite outbreaks and yield in three cocoa agroforestry systems (rustic, intermediate and full sun systems). We monitored cocoa and non-cocoa trees at …
Transcriptional Activation Of Phytochrome-Interacting Factor 4 Is A Conserved Mechanism Of Thermomorphogenesis In Dicotyledenous Plants, Caroline Clutton
Transcriptional Activation Of Phytochrome-Interacting Factor 4 Is A Conserved Mechanism Of Thermomorphogenesis In Dicotyledenous Plants, Caroline Clutton
Honors Theses
In the model dicotyledonous plant Arabidopsis thaliana, the basic helix-loop-helix (bHLH) transcription factor Phytochrome-Interacting Factor 4 (AtPIF4) plays a central role in regulating the ambient temperature-regulated hypocotyl growth response. Warm temperatures induce AtPIF4 transcription and the accumulated AtPIF4 promotes thermomorphogenesis by enhancing the expression of a group of growth-related genes. However, whether this thermo-induced growth response is universal, and more importantly, whether there is a conserved thermomorphogenetic mechanism shared in dicots is largely unknown. Here we show that higher ambient temperatures promote the hypocotyl growth in four other dicotyledonous plants, including Brassica rapa, Camelina sativa, Nicotiana benthamiana …