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Articles 1 - 30 of 37
Full-Text Articles in Entire DC Network
Community-Level Phylogenetic Diversity Does Not Differ Between Rare And Common Lineages Across Tallgrass Prairies In The Northern Great Plains, Sarah A. Herzog, Maribeth Latvis
Community-Level Phylogenetic Diversity Does Not Differ Between Rare And Common Lineages Across Tallgrass Prairies In The Northern Great Plains, Sarah A. Herzog, Maribeth Latvis
Native Plant Focused Publications
Niche differentiation has served as one explanation for species coexistence, and phylogenetic relatedness provides a means to approximate how ecologically similar species are to each other. To explore the contribution of rare species to community phylogenetic diversity, we sampled 21 plant communities across the Prairie Coteau ecoregion, an area of high conservation concern. We used breakpoint analysis through the iterative addition of less abundant species to the phylogenetic tree for each community to assess the contribution of rare species to community phylogenetic diversity. We also quantify the phylogenetic signal of abundance using Blomberg's K statistic and calculated the phylogenetic similarity …
Precipitation And Not Cover Crop Composition Influenced Corn Economic Optimal N Rate And Yield, Hunter Bielenberg, Jason D. Clark, Debankur Sanyal, Johnathon Wolthuizen, David Karki, Amin Rahhal
Precipitation And Not Cover Crop Composition Influenced Corn Economic Optimal N Rate And Yield, Hunter Bielenberg, Jason D. Clark, Debankur Sanyal, Johnathon Wolthuizen, David Karki, Amin Rahhal
Agronomy, Horticulture and Plant Science Faculty Publications
The effects of single species cover crops on corn (Zea mays L.) N requirement and grain yield are well studied throughout the U.S. Midwest. However, comparing cover crop mixes that include different compositions of grass and broadleaf species is limited. Fourteen corn N response experiments were conducted in South Dakota from 2018 to 2021. Fall cover crops planted after small grain harvest were mixtures of dominantly grasses, broadleaves, a 50/50 grass/broadleaf mixture, and a no cover crop control. Compared to the control, including a cover crop led to no differences in economic optimal N rate (EONR) and yield at …
Auxin-Based Herbicide Program For Weed Control In Auxin Resistant Soybean, Joy Amajioyi, Thandiwe Nleya, Graig Reicks, Janet Moriles- Miller, David Clay, Sharon Clay
Auxin-Based Herbicide Program For Weed Control In Auxin Resistant Soybean, Joy Amajioyi, Thandiwe Nleya, Graig Reicks, Janet Moriles- Miller, David Clay, Sharon Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Soybean [Glycine max (L.) Merr.] cultivars resistant to synthetic auxin herbicides have provided another mode of action for the postemergence broadleaf weed control. This field study was conducted at three South Dakota locations [Northeast, NERF; east-central, ARF; and Southeast, SERF) in 2019 and two locations (ARF and SERF) in 2020. The Enlist E3 and Roundup Ready 2 Xtend cultivars were planted at three dates (early, mid-, and late season) to examine weed control, agronomic characteristics, nodulation, and yield. Preemergence (PRE) treatment was flumioxazin + metribuzin + S-metolachlor + glyphosate + pendimethalin. Two postemergence (POST) treatments, based on cultivar, were compared …
Why Are Some Plant Species Missing From Restorations? A Diagnostic Tool For Temperate Grassland Ecosystems, Marcello De Vitis, Kayri Havens, Rebecca S. Barak, Louise Egerton-Warburton, Adrienne R. Ernst, Matt Evans, Jeremie B. Fant, Alicia J. Foxx, Kyndall Hadley, Jim Jabcon, Joan O’Shaughnessey, Sai Ramakrishna, David Sollenberger, Sophie Taddeo, Rafael Urbina-Casanova, Chris Woolridge, Lan Xu, Jacob Zeldin, Andrea T. Kramer
Why Are Some Plant Species Missing From Restorations? A Diagnostic Tool For Temperate Grassland Ecosystems, Marcello De Vitis, Kayri Havens, Rebecca S. Barak, Louise Egerton-Warburton, Adrienne R. Ernst, Matt Evans, Jeremie B. Fant, Alicia J. Foxx, Kyndall Hadley, Jim Jabcon, Joan O’Shaughnessey, Sai Ramakrishna, David Sollenberger, Sophie Taddeo, Rafael Urbina-Casanova, Chris Woolridge, Lan Xu, Jacob Zeldin, Andrea T. Kramer
Natural Resource Management Faculty Publications
The U.N. Decade on Ecosystem Restoration aims to accelerate actions to prevent, halt, and reverse the degradation of ecosystems, and re-establish ecosystem functioning and species diversity. The practice of ecological restoration has made great progress in recent decades, as has recognition of the importance of species diversity to maintaining the long-term stability and functioning of restored ecosystems. Restorations may also focus on specific species to fulfill needed functions, such as supporting dependent wildlife or mitigating extinction risk. Yet even in the most carefully planned and managed restoration, target species may fail to germinate, establish, or persist. To support the successful …
Reproduction Of Soybean Cyst Nematode Populations On Field Pennycress, Henbit, And Purple Deadnettle Weed Hosts, Pawan Basnet, Sharon A. Clay, Emmanuel Byamukama
Reproduction Of Soybean Cyst Nematode Populations On Field Pennycress, Henbit, And Purple Deadnettle Weed Hosts, Pawan Basnet, Sharon A. Clay, Emmanuel Byamukama
Agronomy, Horticulture and Plant Science Faculty Publications
Several weeds serve as alternative soybean cyst nematode (SCN) hosts. Still, the relative reproductive capacity of SCN HG types (Heterodera glycines type) on weed hosts relative to soybean is not well understood. This study examined the reproduction of three South Dakota endemic SCN populations—PSCN-1 (HG 0), PSCN-2 (HG 2.5.7), and PSCN-3 (HG 7)—on purple deadnettle, field pennycress, and henbit. The Relative Female Index (RFI) was calculated to compare SCN reproduction relative to the susceptible soybean check. Weed hosts, HG types, and their interactions influenced SCN reproduction. Henbit (RFI = 51.8) and purple deadnettle (RFI = 47.6) roots had a similar …
Quantification And Machine Learning Based N2o-N And Co2-C Emissions Predictions From A Decomposing Rye Cover Crop, Deepak R. Joshi, David E. Clay, Sharon A. Clay, Janet Moriles Miller, Aaron L.M. Daigh, Graig Reicks, Shania Westhoff
Quantification And Machine Learning Based N2o-N And Co2-C Emissions Predictions From A Decomposing Rye Cover Crop, Deepak R. Joshi, David E. Clay, Sharon A. Clay, Janet Moriles Miller, Aaron L.M. Daigh, Graig Reicks, Shania Westhoff
Agronomy, Horticulture and Plant Science Faculty Publications
Cover crops improve soil health and reduce the risk of soil erosion. However, their impact on the carbon dioxide equivalence (CO2e) is unknown. Therefore, objective of this two-year study was to quantify the effect of cover crop-induced differences in soil moisture, temperature, organic C, and microorganisms on CO2e and to develop machine learning algorithms that predict daily N2O-N and CO2-C emissions. The prediction models tested were multiple linear regression (MLR), partial least square regression (PLSR), support vector machine (SVM), random forest (RF), and artificial neural network (ANN). Models’ performance was accessed using R2 , RMSE and MAE. Rye (secale cereale) …
Increases In Vein Length Compensate For Leaf Area Lost To Lobing In Grapevine, Zoë Migicovsky, Joel F. Swift, Zachary Helget, Laura L. Klein, Anh Ly, Matthew Maimaitiyiming, Karoline Woodhouse, Anne Fennell, Misha Kwasniewski, Allison J. Miller, Peter Cousins, Daniel H. Chitwood
Increases In Vein Length Compensate For Leaf Area Lost To Lobing In Grapevine, Zoë Migicovsky, Joel F. Swift, Zachary Helget, Laura L. Klein, Anh Ly, Matthew Maimaitiyiming, Karoline Woodhouse, Anne Fennell, Misha Kwasniewski, Allison J. Miller, Peter Cousins, Daniel H. Chitwood
Agronomy, Horticulture and Plant Science Faculty Publications
Premise:Leaf lobing and leaf size vary considerably across and within species,including among grapevines (Vitisspp.), some of the best‐studied leaves. Weexamined the relationship between leaf lobing and leaf area across grapevinepopulations that varied in extent of leaf lobing.
Methods:We used homologous landmarking techniques to measure 2632 leavesacross 2 years in 476 unique, genetically distinct grapevines fromfive biparentalcrosses that vary primarily in the extent of lobing. We determined to what extent leafarea explained variation in lobing, vein length, and vein to blade ratio.
Results:Although lobing was the primary source of variation in shape across theleaves we measured, leaf area varied only slightly …
Simulating The Impact Of Crop–Livestock Interaction On Crop Performance Using Dssat, Teerath Rai, Sandeep Kumar, Thandiwe Nleya, Gerrit Hoogenboom
Simulating The Impact Of Crop–Livestock Interaction On Crop Performance Using Dssat, Teerath Rai, Sandeep Kumar, Thandiwe Nleya, Gerrit Hoogenboom
Agronomy, Horticulture and Plant Science Faculty Publications
An integrated crop–livestock system (ICL) can help with enhancing soil quality and crop productivity, ultimately increasing farm income. Field experiments that evalu- ated the impact of cover crops (CCs) and grazing on crop productivity have shown mixed results primarily because of a relatively short duration of the crop–livestock system. Dynamic crop models can help to simulate the long-term impact of soils and crop management on crop yield. The objectives of the current study were to develop a simple simulation methodology for crop–livestock interaction using the Decision Support System for Agrotechnology Transfer (DSSAT) and to evaluate the perfor- mance of CC …
Soybean Management For Seed Composition: The Perspective Of U.S. Farmers, Andre F. Borja Reis, Luiz Rosso, Dan Davidson, Peter Kovacs, Larry C. Purcell, Frederick E. Below, Shaun Casteel, Hans J. Kandel, Seth Naeve, Sotirios V. Archontoulis, Ignacio A. Ciampitti
Soybean Management For Seed Composition: The Perspective Of U.S. Farmers, Andre F. Borja Reis, Luiz Rosso, Dan Davidson, Peter Kovacs, Larry C. Purcell, Frederick E. Below, Shaun Casteel, Hans J. Kandel, Seth Naeve, Sotirios V. Archontoulis, Ignacio A. Ciampitti
Agronomy, Horticulture and Plant Science Faculty Publications
The soybean [Glycine max (L.) Merr.] compositional quality is mainly provided by the seed concentration of protein and oil. These traits are critical for sustaining global use, and although there is demand for high protein soybean, no mechanism to differentiate production is in place. At the opposite end of the supply chain, farmers are remunerated on a mass basis without having any incentive regarding seed composition. This study evaluated farmers' perspectives and knowledge on soybean quality and their propensity to adopt quality improvement technologies. Farmers from the main U.S. producing regions (n = 271) were investigated with a …
The Microbial Nitrogen Cycling, Bacterial Community Composition, And Functional Potential In A Natural Grassland Are Stable From Breaking Dormancy To Being Dormant Again, Bikram Kumar Das, Satoshi Ishii, Linto Antony, Alexander Smart, Joy Scaria, Volker Brozel
The Microbial Nitrogen Cycling, Bacterial Community Composition, And Functional Potential In A Natural Grassland Are Stable From Breaking Dormancy To Being Dormant Again, Bikram Kumar Das, Satoshi Ishii, Linto Antony, Alexander Smart, Joy Scaria, Volker Brozel
Native Plant Focused Publications
The quantity of grass-root exudates varies by season, suggesting temporal shifts in soil microbial community composition and activity across a growing season. We hypothesized that bacterial community and nitrogen cycle-associated prokaryotic gene expressions shift across three phases of the growing season. To test this hypothesis, we quantified gene and transcript copy number of nitrogen fixation (nifH), ammonia oxidation (amoA, hao, nxrB), denitrification (narG, napA, nirK, nirS, norB, nosZ), dissimilatory nitrate reduction to ammonia (nrfA), and anaerobic ammonium oxidation (hzs, hdh) using the pre-optimized Nitrogen Cycle Evaluation (NiCE) chip. Bacterial community composition was characterized using V3-V4 of the …
Climate Change And Management Impacts On Soybean N Fixation, Soil N Mineralization, N2o Emissions, And Seed Yield, Elvis F. Elli, Ignacio A. Ciampitti, Michael J. Castellano, Larry C. Purcell, Seth Naeve, Patricio Grassini, Nicolas C. La Menza, Luiz Moro Rosso, Andre F. De Borja Reis, Peter Kovacs, Sotirios V. Archontoulis
Climate Change And Management Impacts On Soybean N Fixation, Soil N Mineralization, N2o Emissions, And Seed Yield, Elvis F. Elli, Ignacio A. Ciampitti, Michael J. Castellano, Larry C. Purcell, Seth Naeve, Patricio Grassini, Nicolas C. La Menza, Luiz Moro Rosso, Andre F. De Borja Reis, Peter Kovacs, Sotirios V. Archontoulis
Agronomy, Horticulture and Plant Science Faculty Publications
Limited knowledge about how nitrogen (N) dynamics are affected by climate change, weather variability, and crop management is a major barrier to improving the productivity and environmental performance of soybean-based cropping systems. To fill this knowledge gap, we created a systems understanding of agroecosystem N dynamics and quantified the impact of controllable (management) and uncontrollable (weather, climate) factors on N fluxes and soybean yields. We performed a simulation experiment across 10 soybean production environments in the United States using the Agricultural Production Systems sIMulator (APSIM) model and future climate projections from five global circulation models. Climate change (2020–2080) increased N …
Belowground Mechanism Reveals Climate Change Impacts On Invasive Clonal Plant Establishment, Surendra Bam, Jacqueline P. Ott, Jack L. Butler, Lan Xu
Belowground Mechanism Reveals Climate Change Impacts On Invasive Clonal Plant Establishment, Surendra Bam, Jacqueline P. Ott, Jack L. Butler, Lan Xu
Natural Resource Management Faculty Publications
Climate change and disturbance can alter invasion success of clonal plants by differentially affecting the clonal traits influencing their establishment as young plants. Clonal traits related to the vegetative reproduction of native Pascopyrum smithii and non-native Bromus inermis grass seedlings were evaluated under altered precipitation frequencies and a single grazing event. Pascopyrum smithii maintained similar vegetative reproduction under three simulated precipitation frequencies whereas B. inermis vegetative reproduction declined as precipitation became more intermittent. Vegetative reproduction of the non-native B. inermis was greater than the native P. smithii under all simulated precipitation frequencies except the most intermittent scenario. A single grazing …
Southeast South Dakota Experiment Farm Annual Progress Report, 2022, Southeast South Dakota Research Farm
Southeast South Dakota Experiment Farm Annual Progress Report, 2022, Southeast South Dakota Research Farm
Agricultural Experiment Station and Research Farm Annual Reports
This is an annual report of the research program at the Southeast South Dakota Research Farm in cooperation with South Dakota Agricultural Experiment Station and the SDSU College of Agriculture, Food, and Environmental Sciences and has special significance for those engaged in agriculture and the agriculturally related businesses in the ten county area of Southeast South Dakota. The results shown are not necessarily complete or conclusive. Interpretations given are tentative because additional data resulting from continuation of these experiments may result in conclusions different from those based on any one year.
Growing South Dakota (Fall 2021 / Winter 2022), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Fall 2021 / Winter 2022), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)
[Page] 3 SDSU Launches New Professional Program in Veterinary Medicine
[Page] 7 The 6th Generation
[Page] 9 First-Gen Proud
[Page] 11 Student Success
[Page] 21 Alumni News
[Page] 27 CAFES News and Updates
[Page] 45 Jackrabbits Now and Then: A Current Student and Alumni Q&A
Berry Anthocyanin, Acid, And Volatile Trait Analyses In A Grapevine-Interspecific F2 Population Using An Integrated Gbs And Rhampseq Genetic Map, Dilmini Alahakoon, Anne Fennell, Zachary Helget, Terry Bates, Avainash Karn, David Manns, Anna Katherine Mansfield, Bruce I. Reisch, Gavin Sacks, Qi Sun, Cheng Zou, Lance Cadle-Dvidson, Jason P. Londo
Berry Anthocyanin, Acid, And Volatile Trait Analyses In A Grapevine-Interspecific F2 Population Using An Integrated Gbs And Rhampseq Genetic Map, Dilmini Alahakoon, Anne Fennell, Zachary Helget, Terry Bates, Avainash Karn, David Manns, Anna Katherine Mansfield, Bruce I. Reisch, Gavin Sacks, Qi Sun, Cheng Zou, Lance Cadle-Dvidson, Jason P. Londo
Agronomy, Horticulture and Plant Science Faculty Publications
Increased map density and transferability of markers are essential for the genetic analysis of fruit quality and stress tolerance in interspecific grapevine populations. We used 1449 GBS and 2000 rhAmpSeq markers to develop a dense map for an interspecific F2 population (VRS-F2) that was derived by selfing a single F1 from a Vitis riparia x ‘Seyval blanc’ cross. The resultant map contained 2519 markers spanning 1131.3 cM and was highly collinear with the Vitis vinifera ‘PN40024’ genome. Quantitative trait loci (QTL) for berry skin color and flower type were used to validate the map. Four rhAmpSeq …
Phomopsis Stem Canker Of Sunflower (Helianthus Annuus L.): Etiology And Epidemiological Conditions Affecting Endophytic Population Of Diaporthe Spp., And Fungicide Efficacy, Nabin Kumar Dangal
Phomopsis Stem Canker Of Sunflower (Helianthus Annuus L.): Etiology And Epidemiological Conditions Affecting Endophytic Population Of Diaporthe Spp., And Fungicide Efficacy, Nabin Kumar Dangal
Electronic Theses and Dissertations
Phomopsis stem canker (PSC), caused by species of Diaporthe, is a major disease of sunflower (Helianthus annuus L.) in the U.S., which can cause yield loss over 40%. The disease prevalence increased since 2010 in the major sunflower producing U.S. states of Nebraska, Minnesota, North Dakota, and South Dakota. Previous studies on the use of foliar fungicides in managing Phomopsis stem canker indicated mixed results on their efficacy in disease reduction and yield gain. Additionally, we do not have sufficient information on asymptomatic colonization by endophytic Diaporthe on sunflower tissue and how foliar fungicide and weather parameters affect the prevalence …
Regenerative Agriculture Effects On Invertebrate And Bird Communities And Insect-Provided Ecosystem Services, Alex Michels
Regenerative Agriculture Effects On Invertebrate And Bird Communities And Insect-Provided Ecosystem Services, Alex Michels
Electronic Theses and Dissertations
Conventional agricultural practices can have unintended consequences on the environment and wildlife. Insects and birds are declining at rapid rates around the world, and the current conventional agricultural paradigm is a major driver through habitat loss and the intensification of production. Invertebrates in agroecosystems provide services to both farmers and the rest of society. Regenerative systems may promote the functioning of an agroecosystem by influencing invertebrate abundance, diversity, and ecosystem services and mitigate bird and insect declines through conservation practices that increase soil health, reduce disturbances, and increase biological diversity. Here I address knowledge gaps of the effects of regenerative …
Identifying Sources Of Resistance And Fungicide Efficacy Against Fungi Causing Phomopsis Stem Canker In Sunflower, Renan Guidini
Identifying Sources Of Resistance And Fungicide Efficacy Against Fungi Causing Phomopsis Stem Canker In Sunflower, Renan Guidini
Electronic Theses and Dissertations
Phomopsis stem canker is a major threat to sunflower (Helianthus annuus L.) production worldwide and its prevalence has increased from 1.5% in 2001 to 61.0% in 2015 in the sunflower producing U.S. states of Colorado, Kansas, Minnesota, Nebraska, North Dakota, South Dakota, and Texas. The disease causes early senescence and lodging of sunflower plants resulting in yield losses up to 40% and oil content up to 25%. Several species of Diaporthe have been reported to cause Phomopsis stem canker. In the United States, Diaporthe helianthi Munyt.-Cvetk. et al. and D. gulyae Shivas et al., have been reported as predominant causal …
E. Coli Persister Cell Survival And Rhizobia Attachment To Soybean Roots, Tanim Islam
E. Coli Persister Cell Survival And Rhizobia Attachment To Soybean Roots, Tanim Islam
Electronic Theses and Dissertations
The theme of this thesis revolves around how bacteria respond and thrive during stress. Chapters 1-3 are about how bacteria deal with life-threatening antibiotics. Chapter 4 covers new research on how bacteria can move from a stressful individual lifestyle (free-living bacteria) to initiating a symbiotic relationship with a plant (a less stressful lifestyle). In Chapter 1, I briefly summarize the current state of knowledge in the field of antibiotic resistance and persistence. In Chapter 2, I add to this knowledge by providing new insights into several antibiotics' potency and exploring the antibiotic Eagle effect. In Chapter 3, I use pyruvate …
Response Of Soil Biochemical And Physical Properties To Long Term Prairie Cordgrass And Kura Clover Intercropping System, Vaishnavi Varikuti
Response Of Soil Biochemical And Physical Properties To Long Term Prairie Cordgrass And Kura Clover Intercropping System, Vaishnavi Varikuti
Electronic Theses and Dissertations
Prairie cordgrass (Spartina pectinata) (PCG) is a warm-season perennial grass that can be used as a biofuel feedstock and can be grown on marginal lands. Previous studies on intercropping of a perennial legume i.e., kura clover (Trifolium ambiguum) (KC) with PCG can improve soil biochemical properties, increase biomass production, mitigate greenhouse gas (GHG) emissions while reducing the chemical fertilizer requirement. However, there is a lack of evidence about the effects of PCG production on soil biochemical and physical properties during the cropping season and at deeper soil depths in reference to support plant growth, environmental implications and enhance the soil …
Soil Hydro-Physical Properties, Computed Tomography Measured Pore Parameters, And Soil Health Indicators As Influenced By Tillage And Crop Rotation Systems, Goutham Thotakuri
Soil Hydro-Physical Properties, Computed Tomography Measured Pore Parameters, And Soil Health Indicators As Influenced By Tillage And Crop Rotation Systems, Goutham Thotakuri
Electronic Theses and Dissertations
Long-term tillage and crop rotation systems are important agricultural management practices as these can have direct impact on the soil’s key properties. The objectives of this study were to (ⅰ) quantify the soil pore characteristics under long-term tillage and crop rotation using X-ray computed tomography (XCT) and to assess the relationships between XCT-measured pore parameters and soil hydro-physical properties; and (ⅱ) evaluate the impacts of long-term tillage and crop rotation on select soil health indicators. The objective (ⅰ) was carried out at Haskell Agricultural Laboratory (HAL), Concord, NE; and objective (ⅰi) was carried out at South Central Agricultural Laboratory (SCAL), …
It's Not Just No-Till: Crop Rotations Are Key To Improving Soil Quality And Grain Yields At Dakota Lakes Research Farm, Natalie Sturm
It's Not Just No-Till: Crop Rotations Are Key To Improving Soil Quality And Grain Yields At Dakota Lakes Research Farm, Natalie Sturm
Electronic Theses and Dissertations
No-till is increasingly promoted as a vital agricultural practice to address the challenge of improving soil quality while maintaining the ability to produce food, feed, fuel, and fiber. However, questions remain regarding 1) how different crop rotations impact soil quality under no-till management specifically and 2) whether significant improvements in soil quality can be made without negatively impacted crop yields. In this study, we demonstrate that even under the same long-term no-till management, differences in grain yields and soil biological, chemical, and physical properties exist between crop rotations at Dakota Lakes Research Farm in central South Dakota. We propose that …
Genome-Wide Identification Of Wrky Transcription Factor Encoding Genes In Amborella Trichopoda Baill. (Amborellaceae), Bijaya Pradhan
Genome-Wide Identification Of Wrky Transcription Factor Encoding Genes In Amborella Trichopoda Baill. (Amborellaceae), Bijaya Pradhan
Electronic Theses and Dissertations
WRKY transcription factors (TFs) are DNA-binding proteins, which play important roles in managing plant stresses and regulating growth and development processes. The WRKY TF family has expanded significantly through genome/gene duplications in the plant evolutionary process. Although the WRKY TFs have been identified in hundreds of plant species, they are yet to be identified in Amborella trichopoda, a species that represents the most basal group of Angiosperms. The main objectives of this study were to conduct genome-wide identification of the WRKY gene family in A. trichopoda and to assess their homologs in Angiosperms. In this study, we identified …
Effects Of Conservation Management Practices On Soil Health And Crop Yields In Eastern South Dakota, Alex Mclain
Effects Of Conservation Management Practices On Soil Health And Crop Yields In Eastern South Dakota, Alex Mclain
Electronic Theses and Dissertations
Conservation management practice adoption on agricultural land has increased in recent years due to increasing public and private investment. The anticipated impact of increasing conservation management practice adoption are reduced greenhouse gas emissions and improved soil, water, and air quality. Understanding how these conservation management practices affect agricultural producers economically is vital to properly incentivize these practices. The existing literature on how conservation management practices affect soil health and crop yields is mixed and generally has been conducted on experimental research stations. These studies may not fully account for the on-farm effects of conservation management practices. The objectives of this …
Evaluating Fungicide Timing, Efficacy, And Sensitivity As Well As Candidate Resistance Genes Against Fungi Causing Phomopsis Stem Canker In Sunflower, Ruchika Kashyap
Evaluating Fungicide Timing, Efficacy, And Sensitivity As Well As Candidate Resistance Genes Against Fungi Causing Phomopsis Stem Canker In Sunflower, Ruchika Kashyap
Electronic Theses and Dissertations
Phomopsis stem canker is one of the major diseases of sunflower (Helianthus annuus L.) caused by complex of Diaporthe spp., in the U.S. This disease became of economic importance after 2010 epidemic in Minnesota, North Dakota, and South Dakota and since then the prevalence of this diseases has increased due to increased average precipitation in these major sunflower growing regions of the U.S. The two important disease management strategies involve the use of fungicides and partially resistant hybrids. However, over the years, researchers and growers have seen varied results on Phomopsis stem canker disease severity reduction and yield gains, when …
Genome-Wide Association Mapping And Genomic Prediction For Enhancing Fhb Resistance In Hard Winter Wheat, Jinfeng Zhang
Genome-Wide Association Mapping And Genomic Prediction For Enhancing Fhb Resistance In Hard Winter Wheat, Jinfeng Zhang
Electronic Theses and Dissertations
Wheat is one of the most important staple crops providing 20% of energy for 35% of the world population. Fusarium head blight (FHB), primarily caused by the fugal Fusarium graminearum Schwabe, is a damaging disease in wheat that affects global wheat production every year and causes food safety issues. The disease not only reduces the grain yield and quality but also produces mycotoxin in the diseased kernels making them unsuitable for human consumption or as livestock feeds. Breeding FHB resistant cultivar is the most effective and economical approach to managing the disease. This study combines genome-wide association study (GWAS) and …
Study Of Root System Architectural Traits Of Oat And Response To Endophyte Inoculation And Drought Stress, Krishna Ghimire
Study Of Root System Architectural Traits Of Oat And Response To Endophyte Inoculation And Drought Stress, Krishna Ghimire
Electronic Theses and Dissertations
Oat is an important cereal crop grown worldwide. Oats have the potential to contribute to human health due to their unique nutritional attributes. Developing oat cultivars with efficient root systems able to extract heterogeneously distributed soil resources can help maintain yield under drought conditions and in nutrient poor soil. Various root traits determine the soil volume that is explored by the root system for resource acquisition. Knowledge about the genetic control of oat root traits and response to biotic and abiotic environmental factors is lacking. Identifying quantitative trait loci associated with root traits and understanding the response of roots to …
Phosphorus Use And Management Based On Fertilizer Placement, Rate Of Application, And Soil Biota In No-Till Situations, Brennan Alexander Bingham Lewis
Phosphorus Use And Management Based On Fertilizer Placement, Rate Of Application, And Soil Biota In No-Till Situations, Brennan Alexander Bingham Lewis
Electronic Theses and Dissertations
Phosphorus (P) pollution has become a concern among multiple scientific organizations as it leads to eutrophication, an algal bloom that depletes lacustrine and marine ecosystems of native species. Multiple strategies can be implemented to reduce phosphorus loss from agriculture fields, which is often implicated as a cause of eutrophication. Soil phosphorus chemistry results in phosphate fertilizers absorbing to clay minerals over time. Soil phosphorus is lost from agricultural fields primarily through wind and water erosion. No-till practices prevent soil erosion, which reduces the phosphorus from loading into waterways. Fertilizer placement affects phosphorus loss. Surface application of phosphorus fertilizers increases the …
Effect Of Essential Oils In The Control Of Fungal Diseases In Small Grains, Esneider Mahecha Bojaca
Effect Of Essential Oils In The Control Of Fungal Diseases In Small Grains, Esneider Mahecha Bojaca
Electronic Theses and Dissertations
Spring wheat (Triticum aestivum L.) and oats (Avena sativa L.) are important crops due to their high consumption in our daily diet worldwide. They are the main food of consumption per capita due to the high amino-acid content as well of vitamins. However, grain production is limited due to the negative impact of the diseases that cause significant yield loss. Diseases in oats, such as crown rust caused by Puccinia coronata f. sp. avenae (Pca), and in wheat such as Fusarium head blight (FHB) caused by the fungus Fusarium graminearum. Foliar diseases such as tan spot incited by the fungi …
Northern Great Plains Saline Sodic Soil Development, Classification, Remediation, And Management., Shaina Westhoff
Northern Great Plains Saline Sodic Soil Development, Classification, Remediation, And Management., Shaina Westhoff
Electronic Theses and Dissertations
Soil salinity and sodicity are issues of growing concern in the United States (U.S.) and globally. Knowledge gaps for glaciated, dryland salt-affected soils exist because much original salinity and sodicity research focused on irrigated systems. Land managers are being asked to produce food, feed, fiber, and fuel for an expanding global population. The number of land managers and crop advisors who are affected by these soils is increasing. Addressing salinity and sodicity knowledge gaps will be critical for their success. Salinity and sodicity have been impeding crop productivity since the advent of cultivation. Saline and sodic soils form via multiple …