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South Dakota State University

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Articles 121 - 150 of 292

Full-Text Articles in Agronomy and Crop Sciences

Adjusting Corn Nitrogen Management By Including A Mineralizable-Nitrogen Test With The Preplant And Presidedress Nitrate Tests, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan Apr 2020

Adjusting Corn Nitrogen Management By Including A Mineralizable-Nitrogen Test With The Preplant And Presidedress Nitrate Tests, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan

Agronomy, Horticulture and Plant Science Faculty Publications

The anaerobic potentially mineralizable N (PMN) test combined with the preplant (PPNT) and presidedress (PSNT) nitrate tests may improve corn (Zea mays L.) N fertilization predictions. Forty-nine corn N response experiments (mostly corn following soybean [Glycine max (L.) Merr.]) were conducted in the U.S. Midwest from 2014–2016 to evaluate the ability of the PPNT and PSNT to predict corn relative yield (RY) and N fertilizer over- and under-application rates when adjusted by PMN. Before planting and N fertilization, PPNT (0–30, 30–60, and 60–90 cm) and PMN (0–30 cm) samples were obtained. In-season soil samples were obtained at the …

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Soil Sample Timing, Nitrogen Fertilization, And Incubation Length Influence Anaerobic Potentially Mineralizable Nitrogen, Jason Clark, Kristen S. Veum, Fabian G. Fernandez, Newell R. Kitchen, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan Apr 2020

Soil Sample Timing, Nitrogen Fertilization, And Incubation Length Influence Anaerobic Potentially Mineralizable Nitrogen, Jason Clark, Kristen S. Veum, Fabian G. Fernandez, Newell R. Kitchen, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan

Agronomy, Horticulture and Plant Science Faculty Publications

Understanding the variables that affect the anaerobic potentially mineralizable N (PMNan) test should lead to a standard procedure of sample collection and incubation length, improving PMNan as a tool in corn (Zea mays L.) N management. We evaluated the effect of soil sample timing (preplant and V5 corn development stage [V5]), N fertilization (0 and 180 kg ha−1) and incubation length (7, 14, and 28 d) on PMNan (0–30 cm) across a range of soil properties and weather conditions. Soil sample timing, N fertilization, and incubation length affected PMNan differently based on soil and weather conditions. Preplant vs. V5 PMNan …

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Planting Date, Cultivar, Seed Treatment, And Seeding Rate Effects On Soybean Growth And Yield, Thandiwe Nleya, Matthew Schutte, David Clay, Graig Reicks, Nathan Mueller Jan 2020

Planting Date, Cultivar, Seed Treatment, And Seeding Rate Effects On Soybean Growth And Yield, Thandiwe Nleya, Matthew Schutte, David Clay, Graig Reicks, Nathan Mueller

Agronomy, Horticulture and Plant Science Faculty Publications

Soybean [Glycine max (L.) Merr.] yield is a function of many factors including genetic attributes of the cultivar, environmental conditions, and management practices. Temporally variable weather patterns in North America, especially in the northern Great Plains, have resulted in the re-examination of how spring production practices interact with the environmental conditions to influence yield. This study evaluated the impact of four plantings dates, four seeding rates, and two soybean maturity groups (MGs) using treated and untreated (control) seed on soybean growth, seed yield, and composition. The study was conducted at Volga, SD, in 2014, 2015, and 2016. The planting …

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Southeast South Dakota Experiment Farm Annual Progress Report, 2020, Southeast South Dakota Research Farm Jan 2020

Southeast South Dakota Experiment Farm Annual Progress Report, 2020, 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.

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In-Season Crop Management Effect On Soybean Yield And Grain Quality In Eastern South Dakota, Kelsey Bergman Jan 2020

In-Season Crop Management Effect On Soybean Yield And Grain Quality In Eastern South Dakota, Kelsey Bergman

Electronic Theses and Dissertations

Soybean [Glycine max (L.) Merr.] yield has increased over time by introduction of newer varieties and improved agronomic practices. However, grain protein concentration has been decreasing at the same time. New field studies in 2018 and 2019 investigated inseason crop management practices effect such as use of foliar protection application, fertilizer application, different maturity length or different planting dates on grain yield and grain quality. The studies were established near Brookings, SD and Beresford, SD. In-season treatments were targeting nutrient availability or protecting soybean canopy during the grain filling period. Such treatments included the use of fungicide, insecticide, or supplying …

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Reverse Genetic Analysis Of Ehd1 For An Association Between Flowering Time And Seed Dormancy In Rice (Oryza Sativa L.), Yeter Karakoc Jan 2020

Reverse Genetic Analysis Of Ehd1 For An Association Between Flowering Time And Seed Dormancy In Rice (Oryza Sativa L.), Yeter Karakoc

Electronic Theses and Dissertations

This research aimed to understand the evolutionary mechanism of seed dormancy and flowering time and to provide basic knowledge for the manipulation of germination features in crop breeding. Flowering time and seed dormancy are two adaptive traits for flowering plants. Seed dormancy (SD) helps regulate the timing of germination to promote the survival of seed-bearing plants in adverse environments. Cereal crops and weedy/wild relatives, such as Asian cultivated rice and weedy rice (Oryza sativa L.), have weak and strong seed dormancy, respectively. Thus, weedy and cultivated rice has been used as a model system to investigate mechanisms of seed dormancy …

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Determining The Effects Of Plant Extracts And Saltro Nematicide On Hatching, Mortality And Reproduction Of The Soybean Cyst Nematode (Heterodera Glycines), Bishnu Prasad Dhital Jan 2020

Determining The Effects Of Plant Extracts And Saltro Nematicide On Hatching, Mortality And Reproduction Of The Soybean Cyst Nematode (Heterodera Glycines), Bishnu Prasad Dhital

Electronic Theses and Dissertations

Soybean cyst nematode (SCN) is a microscopic worm that infects and feeds from the soybean roots, hence robbing the plant of nutrients, and entry wounds may facilitate other pathogens to infect the roots. Current SCN management practices include cultural, chemical, and biological methods. Cultural practices such as, crop rotation with non-host and different tillage practices are not efficient due to the persistent nature of SCN in the soil. Chemical nematicides, though effective, can be expensive, and some are not environmentally sound. SCN resistant soybean varieties are mainly derived from one source, PI 88788 and SCN population have already evolved to …

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Assembly Of Triticum Boeoticum Ssp. Aegilopoides And Triticum Monoccocum Genomes, Mustafa Aljadi Jan 2020

Assembly Of Triticum Boeoticum Ssp. Aegilopoides And Triticum Monoccocum Genomes, Mustafa Aljadi

Electronic Theses and Dissertations

Wheat is ancient cereal. Wheat has n = 7 chromosomes which is belong to genus Triticum. The group Triticum monococcum sp. aegilopoides(boeoticum) is a diploid wheat (2n = 14). It has a morphology aspect of having narrow, flat spike which usually shatters before harvesting time. The domesticated type of T.boeoticum known as a diploid wheat of Triticum monococcum L. In this research we want to generate a high quality assembly of wild and domesticated type of Einkorn wheat. Our method is using Illumina short sequence reads assembled by both CLC, and W2RAP(Wheat/Whole- genome Robust Assembly Pipeline) software’s. In our approach …

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Crop Rotations, Tillage And Cover Crops Influences On Soil Health, Greenhouse Gas Emissions And Farm Profitability, Jasdeep Singh Jan 2020

Crop Rotations, Tillage And Cover Crops Influences On Soil Health, Greenhouse Gas Emissions And Farm Profitability, Jasdeep Singh

Electronic Theses and Dissertations

This study assessed the effects of three levels of crop rotation: [2-yr; corn (Zea mays L.)- soybean (Glycine max L.), 3-yr; corn-soybean-oat (Avena sativa L.) or 4-yr; cornsoybean- oat-winter wheat (Triticum aestivum L.)], two tillage [conventional-till (CT) and no-till (NT)], and two winter cover cropping systems [cover crop (CC) or fallow control (NC)] on soil biochemical and physical properties, greenhouse gas emissions (GHG), microbial community composition, crop yield and farm profitability under silty clay loam soil of south eastern South Dakota. Experimental design was a randomized complete block design in a split-split plot treatment arrangement with four replications. Rotations, tillage …

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Management Implications Of A Rye Cover Crop On Nutrient Cycling And Soybean Production In Southeast South Dakota: Focus On Rye Seeding Rates And Termination Timing, Benjamin Brockmueller Jan 2020

Management Implications Of A Rye Cover Crop On Nutrient Cycling And Soybean Production In Southeast South Dakota: Focus On Rye Seeding Rates And Termination Timing, Benjamin Brockmueller

Electronic Theses and Dissertations

Winter rye (Secale cereale L.) has become an important cover crop in South Dakota; yet, concerns over negative impacts on cash crop yields is one important limitation to the widespread adoption of winter rye in cropping systems. Two field studies were implemented at the Southeast Research Farm near Beresford, SD investigating the impacts of five seeding rates (0-90 kg ha-1) and termination timings (April 19th- May31st) with the objectives of examining the roles of winter rye management practices on soybean production and yield from nutrient cycling of nitrogen (N) and sulfur (S) in the agroecosystem. Plant, residue, …

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Predicting Farinograph Stability Of Wheat Flour With Mixograph And Glutomatic Tests, Brooke Shumate Jan 2020

Predicting Farinograph Stability Of Wheat Flour With Mixograph And Glutomatic Tests, Brooke Shumate

Electronic Theses and Dissertations

Hard red spring wheat (Triticum aestivum L.; HRSW) flour is typically used to produce wheat-based foods where dough strength is a key quality component. Maintaining acceptable levels of dough strength is an important goal in the development of new HRSW cultivars. In a commercial setting, dough strength is often measured as Farinograph stability, though due to various resource constraints, stability is often predicted in breeding programs via other methods like the Mixograph. The objective of this research was to combine Glutomatic with Mixograph data to determine whether Farinograph stability predictions might be improved over the use of Mixograph data …

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Developing Microbial Based Process To Produce High Value Natural Antimicrobial (Glyceollin) In Soybeans And Pullulan From Sucrose, Andrea Zavadil Jan 2020

Developing Microbial Based Process To Produce High Value Natural Antimicrobial (Glyceollin) In Soybeans And Pullulan From Sucrose, Andrea Zavadil

Electronic Theses and Dissertations

Glyceollin is a secondary metabolite produced under stress conditions by soybean to act as a plant defender to pathogen attack. The antimicrobial nature of glyceollin makes it a promising natural alternative to antibiotics if incorporated into livestock feed. However, production of glyceollin is highly variable, dependent on soybean variety, and fungal elicitor used as inoculum. Our study compares two fungal spore elicitors, Trichoderma reesei and Aspergillus sojae on soybeans of diverse maturity level, and fungal susceptibility to determine highest glyceollin titer. Spore inoculation with T. reesei elicited highest glyceollin titers of 2.42±0.20 mg/g at 120 h, while A. sojae elicited …

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Crop Rotations And Cover Crops Influences On Soil Biochemical Properties, Root Characteristics And Economic Performance, Hanxiao Feng Jan 2020

Crop Rotations And Cover Crops Influences On Soil Biochemical Properties, Root Characteristics And Economic Performance, Hanxiao Feng

Electronic Theses and Dissertations

Introducing cover crops (CC) and increasing crop diversity in agricultural systems are beneficial in improving the soil health and crop production. However, limited research has been conducted that focuses the influence of CC and crop rotation on soil ecosystem, root growth and development, crop production, and economic returns. The objectives of this study were to (i) assess the impacts of CC management on soil enzyme activities and soil microbial community structure changes, (ii) evaluate the crop rotation management on crop root growth and development, nutrient storage in crop grain and biomass, and crop yield, and (iii) investigate the crop rotation …

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The Role Of Endophytes In Conferring Salinity Tolerance In Prairie Cordgrass And The Winter Wheat Mint Variety, Jeffery Bartel Jan 2020

The Role Of Endophytes In Conferring Salinity Tolerance In Prairie Cordgrass And The Winter Wheat Mint Variety, Jeffery Bartel

Electronic Theses and Dissertations

Prairie Cordgrass (PCG) Spartina pectinata is a native grass to North America that survives saline conditions, can be harvested multiple times in a year, and can be used as biofuel. Endophytes are bacteria that reside in plant tissues and often have growthpromoting capabilities. They can assist plants by obtaining nutrients by improving the tolerance of plants against a broad range of stresses, such as plant pathogens, viruses, flooding, drought, acids, or bases. PCG can survive ocean levels of salinity. Endophytes that naturally bond with PCG may not only be able to not only help PCG but be transferred to other …

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Development Of A Near Infrared Reflectance Spectroscopy (Nirs) Platform For Rapid Wheat Quality Analysis, Lily Schimke Jan 2020

Development Of A Near Infrared Reflectance Spectroscopy (Nirs) Platform For Rapid Wheat Quality Analysis, Lily Schimke

Electronic Theses and Dissertations

Wheat is a valuable cereal grain in terms of its growability, versatility, and multifunctional nutritional components. Research into the genetic characteristics and growing conditions of the grain is advantageous to wheat breeders, farmers, food scientists, food processors, and consumers. Optimizing the quality of the wheat grain is important to yielding a crop with the most desirable traits. Analytically obtaining data on the quality attributes of wheat is a lengthy and resource intensive process. Near infrared reflectance spectroscopy (NIRS) technology is rapid, cost-effective, and a powerful analytical tool that can be harnessed to create predictive calibrations for estimations of wheat parameters. …

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Plant Microbial Interactions In Wheat: Fusarium Head Blight And Arbuscular Mycorrhizal Fungi, Yaqoob Rashid Thurston Jan 2020

Plant Microbial Interactions In Wheat: Fusarium Head Blight And Arbuscular Mycorrhizal Fungi, Yaqoob Rashid Thurston

Electronic Theses and Dissertations

Plant microbial interactions consist of the many relationships between plants and microbes which involve studies that observe the biology and molecular genetics of pathological, symbiotic, and associative interactions. Worldwide studies involving these interactions are scarcely available in wheat (Triticum aestivum L.). In South Dakota (SD), wheat research is a major platform used to understand the nature and consequences of these interactions. Specifically, our research efforts here at South Dakota State University (SDSU) concentrate on two different, but valuable, interactions in wheat: the fungal pathogen that causes fusarium head blight (FHB) and the symbiotic interaction of arbuscular mycorrhizae fungi (AMF) with …

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Soil Physical And Hydrological Properties, And Greenhouse Gas Emissions Under Integrated Crop-Livestock Agroecosystems, Navdeep Singh Jan 2020

Soil Physical And Hydrological Properties, And Greenhouse Gas Emissions Under Integrated Crop-Livestock Agroecosystems, Navdeep Singh

Electronic Theses and Dissertations

Cover crops (CCs) and grazing play a critical role in successful implementation of the integrated crop-livestock system (ICLS) because they can have a direct impact on soils and greenhouse gas emissions. The objectives of this study were to (i) evaluate the short-term impacts of CCs [grass dominated cover crops (GdC) and legume dominated cover crops (LdC)] and grazed CCs and corn (Zea mays L.) residue under oat (Avena sativa L.)–CC–corn rotation on soil physical and hydrological properties; (ii) quantify the architecture of soil pores using X-ray computed tomography (CT) for soils managed under long-term ICLS, native grazed pasture and corn-soybean …

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Cover Crop Nutrient Cycling On Western South Dakota Croplands, Justin Brown Jan 2020

Cover Crop Nutrient Cycling On Western South Dakota Croplands, Justin Brown

Electronic Theses and Dissertations

Cover crops (CC) are widely gaining attention and implementation by producers. Much of this is due to the positive influence that CCs can have. Increases in crop yield, biological diversity, water infiltration, and nutrient cycling have been observed as well as reductions in wind and water erosion. The semiarid climate of western South Dakota presents a challenge in the use of CCs with the limited rainfall received. Little research has been done in this area on the effects of CCs on cropland. Three studies were performed to evaluate CCs on nutrient cycling, forage production and crop yield. First, is an …

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Utilizing Rhizospheric And Bacterial Endophytes For Use As Potential Bio-Fertilizers For Sustainable Agricultural Production, Vincent Peta Jan 2020

Utilizing Rhizospheric And Bacterial Endophytes For Use As Potential Bio-Fertilizers For Sustainable Agricultural Production, Vincent Peta

Electronic Theses and Dissertations

Brassica carinata crop production offers an exciting alternative approach to the energy crisis when looking at novel ways to power our motor vehicles. Bacterial endophytes, while residing in host-plant tissues, offer a wide array of plant growth promotion benefits such as nitrogen fixation to impart nitrogen (N) nutrition, phosphate (P) solubilization to make soil-bound phosphate more mobile in soil for plant uptake, can suppress pathogenic microbes such as fungus and produce plant growth hormones to offset stress incurred by the plant. Previous literature has shown that there is large interest in studying endophytes from economically important crops such as wheat, …

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Quantitative Imaging Of Cell-Level Auxin Cytokinin Outputs In Soybean And Model Plants, Paul Gaillard Jan 2020

Quantitative Imaging Of Cell-Level Auxin Cytokinin Outputs In Soybean And Model Plants, Paul Gaillard

Electronic Theses and Dissertations

Auxin and cytokinin are major plant hormones that orchestrate plant development. These hormones are involved in cell division and differentiation and their spatio‐temporal balance controls organ initiation and maturation. Even though independent transcriptional responses to these hormones have been characterized, their concomitant outputs have not been described. We developed methodology to determine auxin-cytokinin relative output (ACRO) ratios at cellular resolution. Hormone-specific fluorescent markers that localize to the nucleus were used to report transcriptional outputs of auxin and cytokinin. Multiphoton microscopy and image data processing were used to quantify their relative ratio at cellular level in three-dimensional tissue volumes. This strategy …

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Use Of Unmanned Aerial System (Uas) For High Throughput Evaluation Of Forage Yield In Oat Breeding Nurseries, Prakriti Sharma Jan 2020

Use Of Unmanned Aerial System (Uas) For High Throughput Evaluation Of Forage Yield In Oat Breeding Nurseries, Prakriti Sharma

Electronic Theses and Dissertations

Current strategies for phenotyping (for traits like biomass) numerous breeding lines under field conditions demand significant investment in both time and labor. Unmanned aerial systems (UAS) can be used to collect vegetation indexes (VI) with high throughput and could provide an efficient way to predict forage yield in breeding nurseries with accuracy. The main objective of the study was to evaluate the use of VIs derived from UAV collected images for estimating crop biomass. For this study, forage trials consisting of 35 oat genotypes were carried out at three locations in 2018 and four locations in 2019. Unmanned aerial vehicles …

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United States Midwest Soil And Weather Conditions Influence Anaerobic Potentially Mineralizable Nitrogen, Jason D. Clark, Kristen S. Veum, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan Sep 2019

United States Midwest Soil And Weather Conditions Influence Anaerobic Potentially Mineralizable Nitrogen, Jason D. Clark, Kristen S. Veum, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan

Agronomy, Horticulture and Plant Science Faculty Publications

Nitrogen provided to crops through mineralization is an important factor in N management guidelines. Understanding of the interactive effects of soil and weather conditions on N mineralization needs to be improved. Relationships between anaerobic potentially mineralizable N (PMNan) and soil and weather conditions were evaluated under the contrasting climates of eight US Midwestern states. Soil was sampled (0–30 cm) for PMNan analysis before pre-plant N application (PP0N) and at the V5 development stage from the pre-plant 0 (V50N) and 180 kg N ha−1 (V5180N) rates and incubated for 7, 14, …

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Management Considerations For Palmer Amaranth In A Northern Great Plains Soybean Production System, Brian Vab De Stroet, Sharon Clay Aug 2019

Management Considerations For Palmer Amaranth In A Northern Great Plains Soybean Production System, Brian Vab De Stroet, Sharon Clay

Agronomy, Horticulture and Plant Science Faculty Publications

Palmer amaranth (Amaranthus palmeri S. Watson) was first observed in a South Dakota field in 2015. This study assessed Palmer amaranth growth based on planting date (PD), impact on soybean [Glycine max (L.) Merr.] yield, and response of seedlings of South Dakota biotype seedlings to herbicides with different mechanisms of action (MOA). Soybean yield loss was influenced by Palmer amaranth density in 2016 (p = 0.001), with yield losses of 33% at densities greater than 15 plants m−2 (R2 = 0.65), although yield losses at low densities were greater than predicted by the fitted …

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Predicting Economic Optimal Nitrogen Rate With The Anaerobic Potentially Mineralizable Nitrogen Test, Jason D. Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan Aug 2019

Predicting Economic Optimal Nitrogen Rate With The Anaerobic Potentially Mineralizable Nitrogen Test, Jason D. Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan

Agronomy, Horticulture and Plant Science Faculty Publications

Estimates of mineralizable N with the anaerobic potentially mineralizable N (PMNan) test could improve predictions of corn (Zea mays L.) economic optimal N rate (EONR). A study across eight US midwestern states was conducted to quantify the predictability of EONR for single and split N applications by PMNan. Treatment factors included different soil sample timings (pre-plant and V5 development stage), planting N rates (0 and 180 kg N ha−1), and incubation lengths (7, 14, and 28 d) with and without initial soil NH4–N included with PMNan. Soil was sampled …

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Chemical Amendments Of Dryland Saline–Sodic Soils Did Not Enhance Productivity And Soil Health In Fields Without Effective Drainage, Girma A. Birru, David E. Clay, Thomas M. Desutter, Cheryl L. Reese, Ann C. Kennedy, Sharon A. Clay, Stephanie A. Bruggeman, Rachel K. Owen, Douglas D. Malo Apr 2019

Chemical Amendments Of Dryland Saline–Sodic Soils Did Not Enhance Productivity And Soil Health In Fields Without Effective Drainage, Girma A. Birru, David E. Clay, Thomas M. Desutter, Cheryl L. Reese, Ann C. Kennedy, Sharon A. Clay, Stephanie A. Bruggeman, Rachel K. Owen, Douglas D. Malo

Agronomy, Horticulture and Plant Science Faculty Publications

A common restoration treatment for saline–sodic soils involves improving soil drainage, applying soil amendments (e.g., CaSO4, CaCl2, or elemental S), and leaching with water that has a relatively low electrical conductivity. However, due to high subsoil bulk densities and low drainable porosities, these treatments many not be effective in glaciated dryland systems. A 3-yr field study conducted in three model systems determined the impact of chemical amendments (none, CaCl2, CaSO4, and elemental S) on plant growth, microbial composition, temporal changes in electrical conductivity (ECe ), and the relative sodium content (%Na). …

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Using Drones For Precision Agriculture, Jiyul Chang, Madhav P. Nepal Mar 2019

Using Drones For Precision Agriculture, Jiyul Chang, Madhav P. Nepal

iLEARN Teaching Resources

In this teaching module, students will learn what Precision Agriculture is and how to apply drone into Precision Agriculture practices. To use data (images) taken by drone, students will learn the basic theory of Remote Sensing. Using images, students learn how to make NDVI (Normalized Difference Vegetation Index) maps and how to apply drone (remote sensing technique) in agriculture.

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Phomopsis Stem Canker Of Sunflower In North America: Correlation With Climate And Solutions Through Breeding And Management, Brent S. Hulke, Samuel G. Markell, Nolan C. Kane, Febina M. Mathew Mar 2019

Phomopsis Stem Canker Of Sunflower In North America: Correlation With Climate And Solutions Through Breeding And Management, Brent S. Hulke, Samuel G. Markell, Nolan C. Kane, Febina M. Mathew

Agronomy, Horticulture and Plant Science Faculty Publications

Climate change is occurring in the central US and is interacting with agroecological factors to increase biotic stress in sunflower. Certain species of Diaporthe cause Phomopsis stem canker in sunflower and other dicotyledonous weeds and crops. The increase in precipitation already observed in the states of North Dakota, South Dakota, and Minnesota have increased the chances of outbreaks of necrotrophic pathogens, like Diaporthe. We discuss how climate trends, combined with technological, management, and economic interactions, are correlated with increasing incidence of Phomopsis stem canker in these and adjacent areas in North America. Further, we discuss management options and the …

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Nitrogen Requirements Of Ethiopian Mustard For Biofuel Feedstock In South Dakota, Phillip Alberti, Shannon Osborne, Febina Mathew, Shakaut Ali, Heidi Sieverding, Sandeep Kumar, Thandiwe Nieya Mar 2019

Nitrogen Requirements Of Ethiopian Mustard For Biofuel Feedstock In South Dakota, Phillip Alberti, Shannon Osborne, Febina Mathew, Shakaut Ali, Heidi Sieverding, Sandeep Kumar, Thandiwe Nieya

Agronomy, Horticulture and Plant Science Faculty Publications

Ethiopian mustard (Brassica carinata A. Braun) is a non-food oilseed crop that has received attention for its potential as a low-input biofuel feedstock suitable for production in the semiarid regions of the Northern Great Plains (NGP). Because B. carinata is a new crop to the NGP, the best management practices have yet to be developed. The objective of the study was to evaluate the effects of N fertilizer rate on seed yield, seed oil concentration, and oil yield of B. carinata and to determine the economic optimum N fertilizer rates. Field studies were conducted at two locations in South …

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Native Grass And Legume Biology And Establishment, Arvid A. Boe, P. J. Johnson Jan 2019

Native Grass And Legume Biology And Establishment, Arvid A. Boe, P. J. Johnson

Oak Lake Field Station 30th Anniversary Retreat Presentations

No abstract provided.

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Crop Residue Management Challenges: A Special Issue Overview, David Clay, Ronald Alverson, Jane M.F. Johnson, Douglas L. Karlen, Sharon Clay, Michael Q. Wang, Stephanie A. Bruggeman, Shaina Westhoff Jan 2019

Crop Residue Management Challenges: A Special Issue Overview, David Clay, Ronald Alverson, Jane M.F. Johnson, Douglas L. Karlen, Sharon Clay, Michael Q. Wang, Stephanie A. Bruggeman, Shaina Westhoff

Agronomy, Horticulture and Plant Science Faculty Publications

The amount of crop residues that can be sustainability removed is highly variable and is a function of many factors including the soil, climatic, and plant characteristics. For example, leaving an insufficient amount of crop residue on the soil surface can be detrimental for soil quality, result in loss of soil organic matter (SOM), and increase soil erosion, whereas leaving excessive amounts can impair soil-seed contact, immobilize N, and/or keep soils cool and wet. This special issue evolved as an outcome of, “Crop Residues for Advanced Biofuels: Effects on Soil Carbon” workshop held in Sacramento, CA, in 2017. The goal …

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