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Full-Text Articles in Life Sciences

The Influence Of Carcass Weight On Beef Primal Temperature, Tenderness, And Palatability, Samantha Egolf Jan 2021

The Influence Of Carcass Weight On Beef Primal Temperature, Tenderness, And Palatability, Samantha Egolf

Electronic Theses and Dissertations

The United States beef industry has experienced increasing hot carcass weights (HCW) and improvements to quality grade the last three decades. Postmortem chilling of beef carcasses is critical to overall product quality. Carcass weight and composition may influence carcass temperatures during postmortem chilling. The objective of this research was to evaluate the effects of HCW and quality grade during postmortem chilling and on product quality. A-maturity carcasses were selected by weight [light = 296–341 kg; middle = 386–432 kg; heavy = 466–523 kg]. A 20 cm data logger was placed into the chuck and round and a 10 cm data …


Exploration Of Host Health Benefits By A Defined Consortium Of Butyrate-Producing Human Gut Bacteria In Gnotobiotic Mouse Model, Linto Antony Jan 2021

Exploration Of Host Health Benefits By A Defined Consortium Of Butyrate-Producing Human Gut Bacteria In Gnotobiotic Mouse Model, Linto Antony

Electronic Theses and Dissertations

Aberrant gut microbiota composition is found to be associated with several human diseases such as inflammatory bowel diseases (IBD). Reduction in butyrate producing bacteria is one of the characteristic features of such dysbiotic bacterial community in the gut. Modulation of gut microbiota to bring the dysbiotic state back to normal healthy state is a promising therapeutic strategy to cure several diseases like recurrent Clostridium difficile infection (rCDI) and IBD where traditional therapies using pharmacological substances fails to make a difference. Restoration of butyrate producers is found to be an effective method of such gut microbiota modulation. The potential to produce …


Gene Network And Pathway Analysis Of Transcriptional Signatures Characterizing Sole Ulcer And Digital Dermatitis In Dairy Cows, Roshin Anie Mohan Jan 2021

Gene Network And Pathway Analysis Of Transcriptional Signatures Characterizing Sole Ulcer And Digital Dermatitis In Dairy Cows, Roshin Anie Mohan

Electronic Theses and Dissertations

This study aimed to evaluate the transcriptomic profile of both corium tissue from lactating dairy cows experiencing sole ulcers and skin lesions from lactating dairy cows diagnosed with digital dermatitis (DD). Hoof biopsies were performed in multiparous Holstein dairy cows selected based on their condition as clinically healthy or diagnosed with sole ulcers (n=7/group). Similarly, skin biopsies were taken from the center of active (M2/M4.1) DD lesions or non-active (M0/M4/M1) from multiparous Holstein dairy cows (n = 7/group) to assess the impact of DD on the skin transcriptome via RNA-seq analysis. All RNA samples were sequenced using Illumina, NovaSeq S4 …


Evaluating Impacts Of Tryptophan And Branched Chain Amino Acids In Swine Diets Containing Corn Based Dried Distillers Grains On The Growth Performance And Carcass Characteristics Of Grow-Finish Pigs, David Alan Clizer Jan 2021

Evaluating Impacts Of Tryptophan And Branched Chain Amino Acids In Swine Diets Containing Corn Based Dried Distillers Grains On The Growth Performance And Carcass Characteristics Of Grow-Finish Pigs, David Alan Clizer

Electronic Theses and Dissertations

A total of four studies were conducted in an effort to determine the impact of Trp and the BCAA in swine diets containing DDGS or HPDDG on the growth performance and carcass characteristics of the growing and finishing pig. The first study utilized 1,170 pigs (PIC 800 x PIC, initial BW 38.6 kg) in a 98-d grow-finish study to determine the performance response of pigs fed increasing levels of SID Trp:Lys in swine diets containing 40% DDGS. Treatments consisted of diets containing 40% DDGS with a SID Trp:Lys ratios of 15, 18, 21, or 24% or a corn-SBM diet for …


Electrical Sensing In Non-Excitable Cells To Promote Galvanotaxis And Tissue Survival, Anyesha Sarkar Jan 2021

Electrical Sensing In Non-Excitable Cells To Promote Galvanotaxis And Tissue Survival, Anyesha Sarkar

Electronic Theses and Dissertations

Weak DC fields have been shown to induce polarity, cell migration and cell proliferation in 2D cultures in vitro. To understand the mechanism by which non-excitable cells sense such weak EFs, we have investigated the mechanism of cathode-directed water flow (electro-osmosis) in the boundary layer of cells by reducing it with neutral, viscous polymers. Our results indicate that low molecular weight polymers decrease cathodal migration and promote anodal migration in a concentration dependent manner. High molecular weight polymers do not affect directionality and can be explained using porosity and hydraulic permeability between the polymers. These results provide the first evidence …


The Role Of The Auxin Biosynthesis And Signaling In Soybean Root Nodule Development, Mucahid Bozkus Jan 2021

The Role Of The Auxin Biosynthesis And Signaling In Soybean Root Nodule Development, Mucahid Bozkus

Electronic Theses and Dissertations

Nitrogen(N) is one of the most important plant nutrients for plant growth and yield, however, its abundance in the soil is not sufficient for profitable crop production. The use of chemical fertilizers helps address soil N deficiency in agriculture. However, due to the environmental pollution resulting from excessive use of fertilizers, alternative forms of N for agriculture are a necessity. Leguminous plants such as soybean (Glycine max) form a symbiotic association with N-fixing rhizobia to meet their N demands. Legume-rhizobia symbiosis results in the formation of unique structures called nodules where rhizobia convert atmospheric nitrogen into plant usable forms, thus …


The Interactions Of Change In Nutrition Prior To And After Artificial Insemination On Plasma Metabolites, Steroid Hormones, And Uterine Histotroph In Beef Heifers, Taylor N. Andrews Jan 2021

The Interactions Of Change In Nutrition Prior To And After Artificial Insemination On Plasma Metabolites, Steroid Hormones, And Uterine Histotroph In Beef Heifers, Taylor N. Andrews

Electronic Theses and Dissertations

The management of heifers can have lifetime effects on their reproductive success and efficiency. Nutrition is one of the management factors that can influence steroid hormone production, oocyte development, embryo development, and uterine histotroph, thus affecting heifers’ reproductive efficiency. Therefore, the objectives of the following studies were to evaluate the impact of nutritional changes prior to and after Artificial Insemination (AI) on plasma cholesterol concentrations, and uterine mineral concentrations (Chapter 2) and the impact of nutritional change after AI on uterine mineral concentrations, steroid hormone production, and circulating metabolites (Chapter 3). In experiment 1 (Chapter 2), beef heifers (n = …


Interrogating The Socio-Ethical Dilemmas Of Precision Agriculture Technologies, Ayorinde Ogunyiola Jan 2021

Interrogating The Socio-Ethical Dilemmas Of Precision Agriculture Technologies, Ayorinde Ogunyiola

Electronic Theses and Dissertations

Farming has moved into a digital age where data and information are available to farmers to make informed agronomic and financial on-farm decisions. The development of precision agriculture (PA), such as big data technologies and machine learning algorithms is transforming the agricultural food production system in diverse ways, economically, environmentally, and socially. Despite benefits afforded by PA to agricultural productivity and environmental sustainability, these technologies can raise unintended societal challenges that can also limit their adoption among farmers. PA is changing how farming is done, reconstructing farmers’ social identities, and influencing relationships between farmers, agronomists, and technology developers. This dissertation …


Pheasant Ecology In An Agricultural Landscape Of South Dakota, Sprih Harsh Jan 2021

Pheasant Ecology In An Agricultural Landscape Of South Dakota, Sprih Harsh

Electronic Theses and Dissertations

Habitat loss and fragmentation are the greatest threats to wildlife conservation. Grasslands are among the most threatened ecosystems worldwide. The large-scale conversion of North American grasslands to cultivation has been strongly associated with declines of grassland bird populations. The ring-necked pheasant (Phasianus colchicus) is a common grassland bird which is negatively impacted by the conversion of grassland to cropland. Though pheasants are non-native to South Dakota, they have become naturalized in most of the state. However, with increases in agricultural intensification in South Dakota, indices of pheasant abundance from brood route surveys suggest that pheasant populations have declined to historically …


An Evaluation Of The Bighorn Sheep Population In Badlands National Park, Austin J. Wieseler Jan 2021

An Evaluation Of The Bighorn Sheep Population In Badlands National Park, Austin J. Wieseler

Electronic Theses and Dissertations

Within the last century, bighorn sheep (Ovis canadensis) in the badlands ecosystem of western South Dakota have been subjected to complete extirpation, reintroduction, disease die-offs, genetic bottlenecking, and population augmentation. Subsequently, the population in Badlands National Park (BNP) appears to have recovered, but it was unknown to what degree past events had influenced the population. From 2017-2019, we conducted research on 5 subherds within 2 management units in BNP to 1) survey for the presence of respiratory pathogens and estimate the prevalence of other potentially infectious diseases; 2) assess adult and lamb survival and cause-specific mortality; 3) estimate population size …


Improving Nutritional Properties And Extractability Of Pea Proteins For Human Consumption Via Fungal Bioprocessing, Camille Massmann Jan 2021

Improving Nutritional Properties And Extractability Of Pea Proteins For Human Consumption Via Fungal Bioprocessing, Camille Massmann

Electronic Theses and Dissertations

Yellow peas are a rich source of protein and phytochemicals. Peas are compatible with many diets restricted by sensitivities, allergies, or personal choice. As a result, peas are gaining popularity in food markets, despite the challenges they present. The biggest challenges for pea proteins in food markets are high content of fiber, starch, and saponins. These components cause processing challenges and create undesirable textures and bitter flavors. Pea proteins are typically extracted with alkaline extraction or air classification methods which result in 80% and 50% protein products respectively. With low protein purity, these products are not competitive with other, more …


The Effects Of Weather, Body Weight, And Feed Intake On Total And Liquid Water Intake In Beef Cattle, Zachary Mcdaniel Jan 2021

The Effects Of Weather, Body Weight, And Feed Intake On Total And Liquid Water Intake In Beef Cattle, Zachary Mcdaniel

Electronic Theses and Dissertations

Two completely randomized design feedlot experiments were conducted over the course of a year. Both experiments were performed in order to determine the effects of weather, body weight (BW), and feed intake on total daily water intake (TDWI) and liquid daily water intake (LDWI) in beef steers. Experiment 1 utilized Angus weaned steers (n = 27; initial BW = 273 + 21.3 kg). Experiment 2 utilized yearling Bos taurus steers (n = 26; initial BW = 421 + 16.2 kg). Individual feed and water intake were collected using the Insentec (Insentec RIC, Hokofarm, Marknesse, Netherlands) automated feeding and water system. …


Cortisol In Hair As A Measure Of Chronic Stress During Sow Gestation And The Pattern Of Cortisol In Blood During Parturition In Sows, Talia Everding Jan 2021

Cortisol In Hair As A Measure Of Chronic Stress During Sow Gestation And The Pattern Of Cortisol In Blood During Parturition In Sows, Talia Everding

Electronic Theses and Dissertations

Cortisol is known as the stress hormone, as it influences many metabolic processes to maintain glucose homeostasis during stressful experiences, including physical and psychological stress. It can be detected in biological matrices such as blood and hair and is released rapidly during sudden stressors and continuously during longterm stress. Blood cortisol fluctuates rapidly in response to acute stressors like pain, exertion, and fear; in hair cortisol accumulates steadily over the period of hair growth and may be useful for detecting chronically elevated cortisol resulting from long-term stress. The objective of this research was to, 1) determine the influence of a …


Exploring The Determinants Of Aspects Of Rotational Grazing In The U.S. Great Plains, Iftekhar Uddin Ahmed Chowdhury Jan 2021

Exploring The Determinants Of Aspects Of Rotational Grazing In The U.S. Great Plains, Iftekhar Uddin Ahmed Chowdhury

Electronic Theses and Dissertations

Pasture and rangeland make up about 45 percent of the agricultural land in the U.S. Great Plains and one of the most common form of mismanagement of this pasture is overgrazing. Which results in many detrimental effects on environment. Many practitioners endorsed Rotational grazing (RG) as an improved grazing management practice over season-long continuous grazing. The overall goal of the current study is to assess the certain aspects of using RG in the U.S. Great Plains. Using mail survey data of the of 874 beef cattle producers of North Dakota, South Dakota, and Texas, the study found that neighborhood practice, …


Genome-Wide Association Analysis Permits Characterization Of Stagonospora Nodorum Blotch (Snb) Resistance In Hard Winter Wheat, Rami Altameemi Jan 2021

Genome-Wide Association Analysis Permits Characterization Of Stagonospora Nodorum Blotch (Snb) Resistance In Hard Winter Wheat, Rami Altameemi

Electronic Theses and Dissertations

Stagonospora nodorum blotch (SNB) is an economically important wheat disease caused by the necrotrophic fungus Parastagonospora nodorum. SNB resistance in wheat is controlled by several quantitative trait loci (QTLs). Thus, the identifying of novel resistance/susceptibility QTLs is crucial for continuous improvement of the SNB resistance. Here, the hard winter wheat association mapping panel (HWWAMP) comprising accessions from breeding programs in the Great Plains region of the US, was evaluated for SNB resistance and necrotrophic effectors (NEs) sensitivity at the seedling stage. A genome-wide association study (GWAS) was performed to identify singlenucleotide polymorphism (SNP) markers associated with SNB resistance and …


The Effects Of Hip Rotation On Hip Abductor Muscle Activation During Lateral Band Walk Exercise, Gina M. Fritz Jan 2021

The Effects Of Hip Rotation On Hip Abductor Muscle Activation During Lateral Band Walk Exercise, Gina M. Fritz

Electronic Theses and Dissertations

BACKGROUND: Lateral band walks (LBW) have been used to strengthen hip abductors and decrease risk of lower extremity injuries. Several methods have been used to complete this exercise to determine which has the best outcome. PURPOSE: The purpose of this study is to compare muscle activation of the gluteus medius (Gmed), gluteus maximus (Gmax), and tensor fasciae latae (TFL) during straight leg LBW exercises performed using three different hip positions: 30-degree internal rotation, 30-degree external rotation, and a neutral hip position. METHODS: Thirty-seven recreationally active participants (10 male, 27 female; age=21.4±2.2 yr; mass=71.4±13kg; height=1.7±0.1 m) completed this study. Surface EMG …


Genetically Modified Corn Diffusion And Biofuel Usage: Impacts On Corn Belt Cropping Systems Changes, Kenneth Annan Jan 2021

Genetically Modified Corn Diffusion And Biofuel Usage: Impacts On Corn Belt Cropping Systems Changes, Kenneth Annan

Electronic Theses and Dissertations

The adoption of genetically modified (GM) crops, the rise of ethanol production that produced an additional derived demand for corn, and the increasingly prominent position of corn and soybeans in crop rotations embody major changes in U.S. agriculture during the past decades. This study investigates the linkages among these developments in two ways. First, we look at how biotechnology and biofuels have influenced cropping system changes in the Corn Belt region of the United States, using state-level data from 2000 to 2019. Second, we investigate the determinants of corn acreage intensification levels and heterogeneity at the state level using data …


Quantifying The Impacts Of An Integrated Crop-Livestock System On Plant Nutrient Accumulation, Crop Yield, And Economic Performance, Teerath Singh Rai Jan 2021

Quantifying The Impacts Of An Integrated Crop-Livestock System On Plant Nutrient Accumulation, Crop Yield, And Economic Performance, Teerath Singh Rai

Electronic Theses and Dissertations

Integrated crop-livestock systems (ICLs), if managed properly, have the potential for enhancing crop production and economics. Cover crops in ICL can be grazed to provide feed for livestock and improve nutrient recycling. This dissertation focused on assessing the impacts of ICL on crop yield and economics using field and modeling studies. Specific objectives of this dissertation are: (i) evaluating the impacts of the ICL on crop yield, and economic performance in a 3-yr oat (Avena sativa L.) – maize (Zea mays L.) – soybean (Glycine max (L.) Merr.) rotation, (ii) assessing the impacts of the ICL on maize biomass accumulation, …


Improvements In Timing Variables For The Timed Up And Go And Its Subphases Following A Progressive Resistance Training Program, Shelby Kasch Jan 2021

Improvements In Timing Variables For The Timed Up And Go And Its Subphases Following A Progressive Resistance Training Program, Shelby Kasch

Electronic Theses and Dissertations

Purpose: To evaluate the effectiveness of progressive resistance training (PRT), with the inclusion of balance and stretching exercises, on the timed up and go (TUG) task. Specifically, we investigated the TUG in regard to changes in timing variables for the entire movement and the subphases, in association with muscular strength, ambulation, fatigue, and perceived disability in patients with Multiple Sclerosis (PwMS).
Methods: Fifteen PwMS volunteered twice weekly for a twelve-week PRT exercise training program. The participants underwent an assessment at baseline (strength assessments using a Biodex dynamometer and one repetition max (1RM); the TUG and its subphases using Qualysis Track …


Corn Grain Alternatives And Coated Versus Non-Coated Trenbolone Acetate And Estradiol Impants For Feedlot Finishing Animals: Influence On Growth Performance, Carcass Characteristics, Efficiency Of Dietary Net Energy Utilization, Beef Production Per Hectare And Digestiblilty, Elizabeth Buckhaus Jan 2021

Corn Grain Alternatives And Coated Versus Non-Coated Trenbolone Acetate And Estradiol Impants For Feedlot Finishing Animals: Influence On Growth Performance, Carcass Characteristics, Efficiency Of Dietary Net Energy Utilization, Beef Production Per Hectare And Digestiblilty, Elizabeth Buckhaus

Electronic Theses and Dissertations

Corn grain alternatives are often not used in finishing rations due to reduced caloric densities and reluctance to deviate from traditional methods. Along with optimum nutrition, cattle need to have proper implant strategies to reap maximum returns on investment. Two studies were conducted to evaluate the effects of corn grain alternatives and implant type on feedlot finishing cattle. The objective of the first study was to determine the influence of corn silage (15% or 30% dry matter inclusion), and terminal implant type (coated or non-coated) containing equal hormonal doses on animal growth performance, apparent total tract digestibility, beef production per …


Studying Morphological, Physiological, And Molecular Regulation Of Stomatal Conductance And Its Relationship To Water Use Efficiency In Alfalfa, Surbhi Gupta Jan 2021

Studying Morphological, Physiological, And Molecular Regulation Of Stomatal Conductance And Its Relationship To Water Use Efficiency In Alfalfa, Surbhi Gupta

Electronic Theses and Dissertations

Alfalfa (Medicago sativa), being a leguminous, highly fibrous, and proteinaceous plant has always been one of the top choices for the forage production but has high cost of irrigation in many dry and warm areas such as California and Arizona. Thus, a reduction of irrigation by using the higher water use efficiency (WUE) varieties can help the growers in reducing the cost and is critical for sustainable agriculture production. WUE is closely related to water loss through transpiring stomata. A study in our lab reported that Riverside (RS) an alfalfa genotype that has naturized in the national grassland in South …


Influence Of Preharvest Management Strategies In Beef Cattle On Growth Performance, Carcass Characteristics, And Meat Quality, Erin Gubbels Jan 2021

Influence Of Preharvest Management Strategies In Beef Cattle On Growth Performance, Carcass Characteristics, And Meat Quality, Erin Gubbels

Electronic Theses and Dissertations

The overall goal of this thesis project was to better understand the influence of preharvest management strategies at critical growth and development periods on beef performance and meat quality. This was accomplished through two primary objectives: 1) to investigate the effects of maternal prepartum dietary energy source during mid- and late-gestation on growth performance, carcass composition, and meat quality of offspring and 2) to compare the influence of two low stress weaning methods with conventional weaning on post-weaning performance and carcass characteristics of steers. For objective 1, Angus-based cows from two sources (n = 129 from South Dakota State University, …


Study On The Human Gut Bacteria Under Different Ecological Conditions: Antibiotic Perturbation And Dietary Quercetin, Shruti Shashidharan Menon Jan 2021

Study On The Human Gut Bacteria Under Different Ecological Conditions: Antibiotic Perturbation And Dietary Quercetin, Shruti Shashidharan Menon

Electronic Theses and Dissertations

The human intestine encompasses a vast community of microorganisms known as the gut microbiota that play a crucial role in maintaining health. Common perturbations such as changes in the normal diet, antibiotic treatment, and changes in environmental conditions can alter the gut microbiome. This can create dysbiosis in the gut leading to disease conditions. Therefore, it becomes important to determine the forces that influence the gut microbial ecology. In the first study, we focus on antibiotic perturbations on microbial succession and resilience in a synthetic consortium consisting of the most prevalent gut bacteria in humans. In addition, we investigated the …


Strength And Body Composition Changes Of Junior Hockey Players During The Competitive Season, Dan Marquette Jan 2021

Strength And Body Composition Changes Of Junior Hockey Players During The Competitive Season, Dan Marquette

Electronic Theses and Dissertations

Purpose: This study investigated the body composition and strength changes of NAHL junior hockey players across a competitive season. It was hypothesized that players would lose lean body mass loss from pre-season to end-season. The secondary hypothesis was that players would lose strength in relation to the anticipated loss in lean body mass. Methods: Outcome measurements were taken at pre-season, mid-season, and endseason points of a competitive NAHL junior hockey season (n = 15, age = 19.1 years). Body composition was measured using air plethysmography (BodPod) and strength was measured using isokinetic strength testing (Biodex). Results: No significant changes in …


Genome Wide Association Study On Kernel Size In Avena Sativa (Oats), Koryne Ann Carlson Jan 2021

Genome Wide Association Study On Kernel Size In Avena Sativa (Oats), Koryne Ann Carlson

Electronic Theses and Dissertations

Kernel size is a vital milling characteristic for Avena sativa L. (oats), with larger kernel size being desirable for milling facilities. This project evaluated the effect of genotype, environment, and their genotype by environment interaction (G by E) on kernel width, length, and area for a set of 27 oat cultivars grown at multiple locations in South Dakota over three years. Findings indicated significant differences among oat varieties, and that environment had a substantial effect on kernel size. However, we did not see a strong influence of genotype by environment interaction on kernel size. The lack of impact for genotype …


Analysis Of Metabolites And Therapeutics For Toxic Inhaled Agent Exposure, Abigail Bemah Donkor Jan 2021

Analysis Of Metabolites And Therapeutics For Toxic Inhaled Agent Exposure, Abigail Bemah Donkor

Electronic Theses and Dissertations

The inhalation of toxic inhaled agents (TIAs) such as methyl isocyanate and cyanide can compromise an individual’s general health due to their extremely toxic nature. Nonetheless, these gases are used extensively in the electronics, chemical, welding, electroplating industries, etc., increasing the risk of exposure to both civilians and industrial workers. It is therefore very crucial to develop analytical methods for TIA metabolites and therapeutic agents. Methyl isocyanate (MIC), an intermediate in the synthesis of carbamate pesticides is a toxic industrial chemical that causes irritation and damage to the eyes, respiratory tracts, and skin. Due to its reactivity with proteins, protein …


Comparison Of Software Packages For Detecting Differentially Expressed Genes From Single-Sample Rna-Seq Data, Rong Zhou Jan 2021

Comparison Of Software Packages For Detecting Differentially Expressed Genes From Single-Sample Rna-Seq Data, Rong Zhou

Electronic Theses and Dissertations

RNA-sequencing (RNA-seq) has rapidly become the tool in many genome-wide transcriptomic studies. It provides a way to understand the RNA environment of cells in different physiological or pathological states to determine how cells respond to these changes. RNA-seq provides quantitative information about the abundance of different RNA species present in a given sample. If the difference or change observed in the read counts or expression level between two experimental conditions is statistically significant, the gene is declared as differentially expressed. A large number of methods for detecting differentially expressed genes (DEGs) with RNA-seq have been developed, such as the methods …


Spatial And Temporal Patterns Of Sympatric Bobcats (Lynx Rufus) And Coyotes (Canis Latrans) In An Agricultural Landscape, Marlin M. Dart Jan 2021

Spatial And Temporal Patterns Of Sympatric Bobcats (Lynx Rufus) And Coyotes (Canis Latrans) In An Agricultural Landscape, Marlin M. Dart

Electronic Theses and Dissertations

Bobcat (Lynx rufus) populations experienced declines in the Midwest during the 20th century due to land conversion for agriculture and over exploitation and were practically nonexistent in areas by the 1970-80s. Populations have been recovering following changes in land-use practices and habitat improvement. Eastern South Dakota was closed to bobcat harvest in 1977 but reopened in 2012 to select counties. Bobcats are elusive, have large home ranges, and occur at low densities, making monitoring their populations difficult. Camera trapping is an effective tool for monitoring elusive carnivores but can be burdened by low detection rates. Researchers often employ …


Revegetating Salt-Impacted Soils In The Northern Great Plains, Abigail P. Blanchard Jan 2021

Revegetating Salt-Impacted Soils In The Northern Great Plains, Abigail P. Blanchard

Electronic Theses and Dissertations

In the northern Great Plains (NGP), an estimated 10.6 million hectares of land are affected by naturally occurring salt-impacted soil. Naturally occurring salt impaction results when rainfall causes salts in parent material to move upward through the soil profile and remain in the root zone causing osmotic and ionic stress, negatively affecting seed imbibition, germination, and plant growth. Common methods to remediate saltimpacted soils were developed in the irrigated soils of the Southwestern U.S., are ineffective in the non-irrigated soils of the NGP, and can exacerbate the problem. Therefore, new methods to remediate salt-impacted soil in the NGP are needed. …


Characterization Of The Rumen Bacterial Communities Of Bison Heifers Fed A Grass-Based Diet Vs A Grain-Based Free-Choice Diet, Anlly Miley Fresno Rueda Jan 2021

Characterization Of The Rumen Bacterial Communities Of Bison Heifers Fed A Grass-Based Diet Vs A Grain-Based Free-Choice Diet, Anlly Miley Fresno Rueda

Electronic Theses and Dissertations

A century ago, the North American grasslands and prairie ecosystems were dominated by bison. At least 30 million bison roamed the Great Plains when the first explorers arrived. By 1900, there were little over a thousand bison remained in the United States and Canada. Recovery efforts has been made since the 20th century to reestablish the herds and increase the bison population. Today, over 500,000 bison are distributed across North America, with more than 90% of the existing bison population under commercial production. Modern conservation strategies are made via the collaborative efforts of conservationist, producers, and researchers, resulting in increased …