Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Animal Sciences (89)
- Beef Science (48)
- Plant Sciences (46)
- Physical Sciences and Mathematics (34)
- Agronomy and Crop Sciences (28)
-
- Microbiology (28)
- Biology (22)
- Food Science (22)
- Social and Behavioral Sciences (19)
- Ecology and Evolutionary Biology (16)
- Agriculture (15)
- Medicine and Health Sciences (15)
- Geography (14)
- Dairy Science (12)
- Environmental Sciences (12)
- Nutrition (10)
- Natural Resources Management and Policy (9)
- Earth Sciences (7)
- Soil Science (7)
- Biochemistry, Biophysics, and Structural Biology (6)
- Terrestrial and Aquatic Ecology (6)
- Aquaculture and Fisheries (5)
- Cell and Developmental Biology (5)
- Engineering (5)
- Genetics and Genomics (5)
- Plant Breeding and Genetics (5)
- Agricultural Economics (4)
- Molecular Biology (4)
- Public Health (4)
- Keyword
-
- Beef (11)
- Diet (4)
- Growth performance (4)
- Cover crops (3)
- Nanofiltration (3)
-
- South Dakota (3)
- Soybean (3)
- Tenderness (3)
- Ultrasound (3)
- Backgrounding (2)
- Bedding (2)
- Carcass merit (2)
- Culturomics (2)
- Endophytes (2)
- Estradiol (2)
- Hydrodynamic cavitation (2)
- Imaging laboratory (2)
- L1 (2)
- Northern Great Plains (2)
- Nutrient cycling (2)
- Nutrition (2)
- Odocoileus virginianus (2)
- Prairie (2)
- Precision Agriculture (2)
- Quality (2)
- Rheology (2)
- Rumen (2)
- Starch (2)
- Swine (2)
- Temperature decline (2)
- Publication
-
- Electronic Theses and Dissertations (97)
- SDSU Beef Day 2020 Summary Publication (45)
- College of Natural Sciences Newsletters and Reports (12)
- Agronomy, Horticulture and Plant Science Faculty Publications (11)
- Biology and Microbiology Graduate Students Plan B Research Projects (11)
-
- Natural Resource Management Faculty Publications (5)
- The Journal of Undergraduate Research (4)
- Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences) (3)
- Schultz-Werth Award Papers (3)
- Animal Science Newsletters (2)
- Native Plant Focused Publications (2)
- iLEARN Teaching Resources (2)
- Agricultural Experiment Station and Research Farm Annual Reports (1)
- Animal Science Data Sets (1)
- Counseling and Human Development Faculty Publications (1)
- Dairy Digest (1)
- Health and Nutritional Sciences Graduate Students Plan B Capstone Projects (1)
- NRM Departmental Data Sets (1)
- Research: South Dakota State University (1)
- The Jackrabbit Dairy & Food Review (1)
- Publication Type
- File Type
Articles 1 - 30 of 205
Full-Text Articles in Life Sciences
South Dakota State University : Research 2020, Division Of Research And Economic Development
South Dakota State University : Research 2020, Division Of Research And Economic Development
Research: South Dakota State University
[Page] 2 New respirator design to capture, kill coronavirus
[Page] 3 SDSU scientists to examine how coronavirus infects cells
[Page] 4 State diagnostic lab fulfills need for human COVID-19 testing
[Page] 5 Isaacson to help develop tribal palliative care programs
[Page] 6 Sun Grant funding fuels bioprocessing research
[Page] 8 Prairie AquaTech exporting high-protein feed ingredient
[Page] 11 New connection makes building repair fast, cost-effective
[Page] 12 Record-setting wildfire season drastically increases emissions
[Page] 14 Engineering study examines sunflower stem growth
[Page] 15 State Poet Laureate unveils ‘South Dakota in Poems'
[Page] 16 Reineke receives NIH grant to help eradicate …
Tillage Method And Glyphosate-Resistant Alfalfa Termination Timing Affect Soil Properties And Subsequent Corn Yield, Jason Clark, Matt A. Yost, Grant E. Cardon, Corey V. Ransom, J. Earl Creech
Tillage Method And Glyphosate-Resistant Alfalfa Termination Timing Affect Soil Properties And Subsequent Corn Yield, Jason Clark, Matt A. Yost, Grant E. Cardon, Corey V. Ransom, J. Earl Creech
Agronomy, Horticulture and Plant Science Faculty Publications
Application of glyphosate [N-(phosphonomethyl) glycine]-containing herbicides and tillage, alone or in combination, has been the standard for removing declining alfalfa (Medicago sativa L.) stands. With glyphosate no longer an option to control glyphosate-resistant alfalfa, different termination strategies are needed. Field studies across four site-years in Utah evaluated the effect of tillage type and timing (fall conventional till, spring conventional till, fall strip-till, spring strip-till, and no-till) and herbicide timing (fall, spring, in-crop, and no herbicide) of 2,4-D (2,4- dichlorophenoxyacetic acid) and dicamba (3,6-dichloro-2-methoxybenzoic acid) on penetration resistance, alfalfa regrowth, corn (Zea mays L.) emergence rate, and silage corn yield. Across …
College Of Natural Sciences 2020 Year-End Publication, College Of Natural Sciences
College Of Natural Sciences 2020 Year-End Publication, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
This is the inaugural issue of the College of Natural Sciences' year-end publication.
Contents:
[Page] 4 COVID-19 Response
[Page] 6 Student Success
[Page] 8 Faculty Excellence
[Page] 10 Awards and Recognition
College Of Natural Sciences Newsletter, November 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, November 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Volume 1. Issue 10
Content:
Dean’s Update P.1
Awards & Recognition P.2
Student Club Spotlight P.3
Open PRAIRIE | Interest in Science P.4
Bioethics Lecture P.5
External Advisory Board P.6
Science as Art Competition P.7
College Of Natural Sciences Newsletter, October 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, October 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Volume 1. Issue 9
Content:
Dean’s Update P.1
Awards & Recognition P.2
Student Club Spotlight P.3
Open PRAIRIE | Research Overview P.4
Interest in Science | Updates P.5
Where’s Wil? P.6 Art
Competition Announcement P.7
Breeding Alfalfa For Semiarid Regions In The Northern Great Plains: History And Additional Genetic Evaluations Of Novel Germplasm, Arvid A. Boe, Kevin D. Kephart, John D. Berdahl, Mike D. Peel, E. Charles Brummer, Lan Xu, Yajun Wu
Breeding Alfalfa For Semiarid Regions In The Northern Great Plains: History And Additional Genetic Evaluations Of Novel Germplasm, Arvid A. Boe, Kevin D. Kephart, John D. Berdahl, Mike D. Peel, E. Charles Brummer, Lan Xu, Yajun Wu
Natural Resource Management Faculty Publications
Yellow-flowered alfalfa (Medicago sativa subsp. falcata) (also known as sickle medic) has been the cornerstone for breeding alfalfa for dual grazing and hay production in the semiarid regions of the northern Great Plains in the US and Canada. Most, if not all, of the cultivars developed for the northern Great Plains during the 20th century, had parentage tracing back to introductions by Niels Ebbesen Hansen that were obtained from expeditions to Russia, primarily the province of Siberia, on behalf of the United States Department of Agriculture during the early 1900s. The M. falcata genome contains alleles for high levels of …
Weather And Soil In The Us Midwest Influence The Effectiveness Of Single-And Split-Nitrogen Applications In Corn Production, Jason Clark, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan
Weather And Soil In The Us Midwest Influence The Effectiveness Of Single-And Split-Nitrogen Applications In Corn Production, Jason Clark, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan
Agronomy, Horticulture and Plant Science Faculty Publications
Splitting the N application into two or more timings may improve corn (Zea mays L.) grain yield and N recovery relative to a single-N application. A 49 site-year study across eight U.S. Midwestern states compared the effect of an at-planting (single-N application) and two split-N applications [45 (45+SD) or 90 kg N ha−1 (90+SD) at planting with the remainder of the total rate (180 or 270 kg N ha−1) applied at V9]. For split-N applications, soil and plant responses were similar between 45+SD and 90+SD 93–98% of the time, indicating the at-planting N rate of 45 kg N ha−1 may …
College Of Natural Sciences Newsletter, September 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, September 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Issue 1. Volume 8
Contents:
Dean’s Update P.1
Awards & Recognition P.2
Interest in Science | Competitions P.3
Open PRAIRIE | ODFS Recap P.4
ODFS Recap | Research Spotlight P.5
Spring 2020 Dean’s List P.6-7
Spring‐Applied Corn Herbicides Impact Fall‐Planted Cover Crops In South Dakotaa, Sydney Pridlie, S. A. Clay, G. Shaffer
Spring‐Applied Corn Herbicides Impact Fall‐Planted Cover Crops In South Dakotaa, Sydney Pridlie, S. A. Clay, G. Shaffer
Agronomy, Horticulture and Plant Science Faculty Publications
Early spring herbicide applications can have residuals that impede fall‐planted cover crop growth. A greenhouse study examined radish (Raphanus sativus L.) or rye (Secale cereale L.) growth in silty clay loam (southeastern South Dakota) and silt loam (north‐central South Dakota) where corn herbicides had been applied about 120 d prior to collection. S‐metolachlor, acetochlor, flumetsulam, metribuzin, bicyclopyrone + mesotrione + S‐metolachlor + atrazine, and primisulfuron‐methyl + prosulfuron (northern site only) were applied at the suggested timing and highest recommended rate and planted to corn (Zea mays L.). Two 11‐cm diam. soil cores to a 10‐cm …
College Of Natural Sciences Newsletter, August 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, August 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Volume 1. Issue 7
Contents:
Dean’s Update P.1
Awards & Recognition P.2
New Faculty | Student Clubs P.3
Research Spotlight | Open PRAIRIE P.4
ODFS | Interest in Science P.3
Source Data: Evaluation Of Batch Fraction, Corn Silage Inclusion Level, And Mixing Duration On Long Particle Distribution Of Finishing Diets For Beef Cattle, Elizabeth Buckhaus, Dathan Smerchek, Zachary K. Smith
Source Data: Evaluation Of Batch Fraction, Corn Silage Inclusion Level, And Mixing Duration On Long Particle Distribution Of Finishing Diets For Beef Cattle, Elizabeth Buckhaus, Dathan Smerchek, Zachary K. Smith
Animal Science Data Sets
This data set was used for the project titled “Evaluation of batch fraction, corn silage inclusion level, and mixing duration on long particle distribution of finishing diets for beef cattle”
Corresponding author: Zachary K. Smith (Zachary.Smith@sdstate.edu)
File type: .xlsx
File size: 265 KB
One In The Hand Worth Two In The Bush? Reproductive Effort Of Young Males Is Not Affected By The Presence Of Adult Males, Kevin L. Monteith, Kyle B. Monteith, Jonathan A. Jenks, Rhiannon P. Jakopak
One In The Hand Worth Two In The Bush? Reproductive Effort Of Young Males Is Not Affected By The Presence Of Adult Males, Kevin L. Monteith, Kyle B. Monteith, Jonathan A. Jenks, Rhiannon P. Jakopak
Natural Resource Management Faculty Publications
Reproduction is a costly endeavor, and most large, long-lived, and iteroparous mammals exhibit conservative life-history tactics wherein an individual may forego or abandon a reproduction event for the sake of survival. Nevertheless, risks and benefits associated with reproduction are not equal across males and females, nor across their life. Whereas expenditure for females is associated with rearing young (e.g., lactation), expenditure for males occurs with securing mating opportunities. Young males may be more successful when dominant males are lacking, but it is less clear whether—and at what cost—young males will expend effort when those opportunities arise. We designed an experiment …
Organic Fertilizer Abrasive Grits Increase Soil Available Nitrogen, Plant Height, And Biomass, Michael Carlson, Frank Forcella, Sam Wortman, David Clay, Sharon A. Clay
Organic Fertilizer Abrasive Grits Increase Soil Available Nitrogen, Plant Height, And Biomass, Michael Carlson, Frank Forcella, Sam Wortman, David Clay, Sharon A. Clay
Agronomy, Horticulture and Plant Science Faculty Publications
In organic cropping systems, air‐propelled abrasive grits can be used to control in‐row weeds. If the applied abrasive grit is an approved organic fertilizer, these applications may serve a dual purpose of weed control and crop fertility. Laboratory soil incubations examined the N mineralization rates of several grit types with differing C/N ratios (Agra Grit [crushed walnut shells, 170:1], corncob grit [91:1], Sustane [composted turkey litter, 5.0:1], Phytaboost Plant Food [crushed and pelletized soybean meal, 5.0:1]). A greenhouse study determined plant wheat (Triticum aestivum L.), kale (Brassica napus pabluaria DC), and velvetleaf (Abutilon theophrasti Medik.) growth response …
An Examination Of Best Practices For Survey Research With Agricultural Producers, Edem Avemegah, Wei Gu, Abdelrahim Abulbasher, Kristen Koci, Ayorinde Ogunyiola, Joyce Eduful, Shuang Li, Kylie Barington, Tong Wang, Deepthi Kolady, Lora Perkins, A. Joshua Leffler, Peter Kovacs, Jason Clark, David Clay, Jessica D. Ulrich-Schad
An Examination Of Best Practices For Survey Research With Agricultural Producers, Edem Avemegah, Wei Gu, Abdelrahim Abulbasher, Kristen Koci, Ayorinde Ogunyiola, Joyce Eduful, Shuang Li, Kylie Barington, Tong Wang, Deepthi Kolady, Lora Perkins, A. Joshua Leffler, Peter Kovacs, Jason Clark, David Clay, Jessica D. Ulrich-Schad
Agronomy, Horticulture and Plant Science Faculty Publications
To improve the economic and environmental sustainability of agriculture, information is needed on how to target research, teaching, and outreach programs. However, conducting survey research in general, and with agricultural producers specifically, is increasingly challenging given issues such as declining response rates and limited resources. While studies examining the best practices for promoting higher response rates exist, few focus explicitly on agricultural producers. In three separate surveys conducted with agricultural producers in South Dakota in 2018 and 2019, we included experiments testing how token pre-incentives, a research partnership, and response mode options impacted response rates. We also examined how sample …
Causal Explanations For The Evolution Of ‘Low Gear’ Locomotion In Insular Ruminants, Roberto Rozzi, Sara Varela, Pere Bover, Jeff Martin
Causal Explanations For The Evolution Of ‘Low Gear’ Locomotion In Insular Ruminants, Roberto Rozzi, Sara Varela, Pere Bover, Jeff Martin
Natural Resource Management Faculty Publications
Aim: Mammals on islands often undergo remarkable evolutionary changes. The acquisition of ‘low gear’ locomotion, namely short and robust limb elements, has been typically associated with the island syndrome in large mammals and, especially, ruminants. Here we provide an investigative framework to examine biotic and abiotic selective factors hypothesized to influence evolution of this peculiar type of gait. Location: Islands worldwide.
Taxon: Bovidae.
Methods: We calculated response variables associated with ‘low gear’ locomotion in 21 extinct and extant insular bovids. We assembled data on the physiography of 11 islands and on life history and ecological traits of the focal taxa. …
Teosinte (Zea Mays Ssp Parviglumis) Growth And Transcriptomic Response To Weed Stress Identifies Similarities And Differences Between Varieties And With Modern Maize Varieties, S. A. Bruggeman, D. P. Horvath, A. Y. Fennell Dr, J. A. Gonzalez-Hernandez, S. A. Clay
Teosinte (Zea Mays Ssp Parviglumis) Growth And Transcriptomic Response To Weed Stress Identifies Similarities And Differences Between Varieties And With Modern Maize Varieties, S. A. Bruggeman, D. P. Horvath, A. Y. Fennell Dr, J. A. Gonzalez-Hernandez, S. A. Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Transcriptomic responses of plants to weed presence gives insight on the physiological and molecular mechanisms involved in the stress response. This study evaluated transcriptomic and morphological responses of two teosinte (Zea mays ssp parviglumis) (an ancestor of domesticated maize) lines (Ames 21812 and Ames 21789) to weed presence and absence during two growing seasons. Responses were compared after 6 weeks of growth in Aurora, South Dakota, USA. Plant heights between treatments were similar in Ames 21812, whereas branch number decreased when weeds were present. Ames 21789 was 45% shorter in weedy vs weed-free plots, but branch numbers were similar between …
Growing South Dakota (Spring/Summer 2020), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Spring/Summer 2020), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)
This issue contains the South Dakota Agricultural Experiment Station 2019 Annual Report.
[Page] 2 South Dakota Agricultural Experiment Station Update
[Page] 4 Featured Research
[Page] 14 Graduate and Undergraduate Research: In Our Own Words
[Page] 20 Featured Research
[Page] 32 Research in Progress
[Page] 38 CAFES News and Updates
[Page] 56 Jackrabbits Now and Then: A Current Student and Alumni Q&A
Animal Science Department News, Department Of Animal Science
Animal Science Department News, Department Of Animal Science
Animal Science Newsletters
No abstract provided.
Sdsu Beef Day 2020 Complete Proceedings, Department Of Animal Science
Sdsu Beef Day 2020 Complete Proceedings, Department Of Animal Science
SDSU Beef Day 2020 Summary Publication
This is the complete proceedings of the South Dakota State University, Department of Animal Science Beef Day 2020. The proceedings contain research presented on the following topics:
Cow/Calf
SDSU Extension
Feedlot
Meat and Human Nutrition
Reproduction
Habitat Selection Of White-Tailed Deer Fawns And Their Dams In The Northern Great Plains, Eric S. Michel, Bailey S. Gullikson, Katherine L. Brackel, Brian A. Schaffer, Jonathan A. Jenks, William F. Jensen
Habitat Selection Of White-Tailed Deer Fawns And Their Dams In The Northern Great Plains, Eric S. Michel, Bailey S. Gullikson, Katherine L. Brackel, Brian A. Schaffer, Jonathan A. Jenks, William F. Jensen
Natural Resource Management Faculty Publications
Habitat availability can affect important life-history traits such as survival; however, little information exists on how microhabitat characteristics found at parturition sites selected by dams and bed sites selected by their offspring differ fromthe surrounding area and from each other. Therefore, we assessed how vegetation affected maternal parturition and offspring bed site selection for white-tailed deer (Odocoileus virginianus) in the Northern Great Plains. Dams selected for sites with decreased vegetation height, potentially improving their visibility, which may increase their ability to escape approaching predators. Conversely, there was no variation between vegetative characteristics at neonate bed sites and their associated random …
Soil-Nitrogen, Potentially Mineralizable-Nitrogen, And Field Condition Information Marginally Improves Corn Nitrogen Management, 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
Soil-Nitrogen, Potentially Mineralizable-Nitrogen, And Field Condition Information Marginally Improves Corn Nitrogen Management, 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
Anaerobic potentially mineralizable nitrogen (PMN) combined with preplant nitrate test (PPNT) or pre-sidedress nitrate test (PSNT) may improve corn (Zea mays L.) N management. Forty-nine corn N response studies were conducted across the U.S. Midwest to evaluate the capacity of PPNT and PSNT to predict grain yield, N uptake, and economic optimal N rate (EONR) when adjusted by soil sampling depth, soil texture, temperature, PMN, and initial NH4–N from PMN analysis. Pre-plant soil samples were obtained for PPNT (0- to 30-, 30- to 60-, 60- to 90-cm depths) and PMN (0- to 30-cm depth) before corn planting and N fertilization. …
Growing South Dakota (Summer 2020), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Summer 2020), College Of Agriculture, Food And Environmental Sciences
Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)
[Page] 3 COVID-19: From Our Students' Perspective
[Page] 11 Class of 2020 Q&A
[Page] 19 Alumni Advice for the Future Generation
[Page] 21 Recent Alumni Features
[Page] 25 Student Features
[Page] 31 CAFES News, Student Success, Awards and Achievements
[Page] 57 Jackrabbits Now and Then: A Current Student and Alumni Q&A
College Of Natural Sciences Newsletter, July 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, July 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Volume 1. Issue 6
Contents:
Dean’s Update P.1
Awards & Recognition P.2
Interest in Science | Updates P.3
Research Spotlight | Open PRAIRIE P.4
Monthly Photo Series: Books P.5
Conservation Of Kit Foxes In The Great Basin Desert: A Review And Recommendations, Robert Lonsinger, Brian M. Kluever, Lucas K. Hall, Randy T. Larsen, Eric M. Gese, Lisette P. Waits, Robert N. Knight
Conservation Of Kit Foxes In The Great Basin Desert: A Review And Recommendations, Robert Lonsinger, Brian M. Kluever, Lucas K. Hall, Randy T. Larsen, Eric M. Gese, Lisette P. Waits, Robert N. Knight
NRM Departmental Data Sets
This data represents a compilation of kit fox (Vulpes macrotis) location within the U.S. state of Nevada and Utah.
File type: xlsx
File Size: 106kb
This dataset is associated with the following article:
Consideration of sample source for establishing reliable genetic microsatellite data from mammalian carnivore specimens held in natural history collections, Journal of Mammalogy, Volume 100, Issue 5, 22 October 2019, Pages 1678–1689, https://doi.org/10.1093/jmammal/gyz112
Uav For Precision Agriculture, Jiyul Chang
Uav For Precision Agriculture, Jiyul Chang
iLEARN Teaching Resources
Readers will find answers to the following questions:
- What is Precision Ag Practice?
- Why is Remote Sensing used in Agriculture?
- What and Why is NDVI?
- UAV for Precision Agriculture?
- How to use UAV for Precision Agriculture?
- What are the main steps involved in Drone Work (Planned Flying)?
College Of Natural Sciences Newsletter, June 2020, College Of Natural Sciences
College Of Natural Sciences Newsletter, June 2020, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Volume 1. Issue 5
Contents:
Dean’s Update P.1
Awards & Recognition P.2
Club Spotlight P.3 Interest in Science | Welcome P.4
Research Spotlight | NSO Update P.5
Monthly Photo Series: Gardens P.6
Evaluation Of Ruminal Net Wrap Accumulation In Cows Fed Ground Hay, A. A. Harty, K. Grott
Evaluation Of Ruminal Net Wrap Accumulation In Cows Fed Ground Hay, A. A. Harty, K. Grott
SDSU Beef Day 2020 Summary Publication
Objective: To determine how rapidly net wrap accumulation occurs in the rumen when hay is ground without net wrap removal.
Assessing Passive Transfer And Respiratory Pathogen Colonization Of Neonatal Beef Calves In A Confinement Operation, Russ Daly, Christian Rozeboom, Jonathan Sumption
Assessing Passive Transfer And Respiratory Pathogen Colonization Of Neonatal Beef Calves In A Confinement Operation, Russ Daly, Christian Rozeboom, Jonathan Sumption
SDSU Beef Day 2020 Summary Publication
1) Determine adequacy of passive transfer, and specifically Mannheimia hemolytica antibodies, in 2 subsets of neonatal calves.
2) Characterize presence and relative levels of respiratory pathogens – and changes over time – in nasal swabs in 2 cohorts of calves.
3) Use the results to determine whether changes in vaccine programs are warranted in this herd.
Heavy Winter Patch Grazing As An Alternative To Prescribed Burning On The Northern Great Plains, Jameson R. Brennan, Patricia Johnson, Ken Olson, Jennifer Lutze
Heavy Winter Patch Grazing As An Alternative To Prescribed Burning On The Northern Great Plains, Jameson R. Brennan, Patricia Johnson, Ken Olson, Jennifer Lutze
SDSU Beef Day 2020 Summary Publication
Among management systems intended to increase heterogeneity on the landscape, patch burn grazing (PBG) is by far the most prominent and researched method. Though prescribed burning is seen as a healthy disturbance in grassland ecosystems, many landowners in the Northern Great Plains have an aversion to fire. This is due to safety and liability concerns as well as concerns over forage losses and limitations of labor, equipment, and insurance to successfully carry out prescribed burns. Therefore, there is a critical need to evaluate alternative, non-fire management strategies that will encourage rangeland heterogeneity. A study was conducted in 2017-2018 at the …
Evaluation Of Variation Attributable To Lab And Technician For Measurements Of Beef Carcass Traits Made Using Ultrasound, B. Schmidt, M.D. Macneil, M. G. Gonda
Evaluation Of Variation Attributable To Lab And Technician For Measurements Of Beef Carcass Traits Made Using Ultrasound, B. Schmidt, M.D. Macneil, M. G. Gonda
SDSU Beef Day 2020 Summary Publication
National cattle genetic evaluations assume technician and imaging lab do not contribute to phenotypic variation when measuring carcass traits by ultrasound. The objective of this study was to estimate variance components of ultrasound carcass measurements, specifically variance contributed by ultrasound technician and imaging laboratory. Accounting for technician and imaging lab variation may increase accuracy of genetic predictions for carcass traits. Ultrasound carcass predictions for ribeye area (REA), percent intramuscular fat (IMF), and backfat (BF) were provided by the American Angus Association (AAA; n=281,982 animals), American Hereford Association (AHA; n=49,602), and American Simmental Association (ASA; n=59,576) for a total of 391,160 …