Results :: Search Electronic Theses and Dissertations (ETDs)

Your search for Keyword herbicide resistance resulted in 34 match(es).

Back to search page

View next 25 results

Restoration of Spotted Knapweed Infested Grasslands in Glacier National Park: Author: Stringer, Lewis Tipton; Date: 2003-12-15; Program: Land Rehabilitation; Abstract: There is an immediate and on-going need in Glacier National Park (GNP), and other public and private lands, to determine effective methods to re-establish and sustain native plant populations following control treatments of Centaurea maculosa. My research was developed in response to GNP concerns regarding annual herbicide treatment of C. maculosa invaded sites. The aim of this study was to determine if herbicide applications, site preparation and revegetation methods would increase the density and percent cover of native species, while reducing spotted knapweed at two sites in and near Glacie...; Download File | View full details

Wheat Yield Prediction Modeling for Localized Optimization of Fertilizer and herbicide Application: Author: Wagner, Nicole Catherine; Date: 2004-08-15; Program: Land Resources and Environmental Sciences; Abstract: The specific goal of this thesis was the development of a five-variable dryland wheat yield prediction model for the optimal localized variable-rate management of fertilizer and herbicide considering varying levels of available water and weed infestation. The motivation for this work was to increase on-farm net return and reduce off-target chemical effects. The five most influential predictor variables of wheat yield were investigated: wheat density, wild oat density, nitrogen fertilizer rate, herbicide rate, and water level Previously collected field data sets that included dryland wheat yiel...; Download File | View full details

Invasiveness of Yellow Toadflax (Linaria Vulgaris) resulting from disturbance and environmental conditions: Author: Lehnhoff, Erik Adam; Date: 2008-05-15; Program: Ecology and Environmental Sciences; Abstract: Invasive plant species are considered to be one of the greatest threats to ecosystems and biological diversity throughout the world, and are thus often aggressively managed. The degree of plant invasiveness, however, varies both with environment and with type of landscape disturbance. This research was designed to understand how the factors of environment and disturbance affect the invasiveness of Linaria vulgaris (yellow toadflax) in southwest Montana and to quantify the varying degrees of invasiveness resulting from each factor. Data were obtained through four separate projects. The effects ...; Download File | View full details

Establishment and seed production of native forbs used in restoration: Author: Wiese, Jessica Linsay; Date: 2009-08-15; Program: Land Resources and Environmental Sciences; Abstract: The importance of incorporating native wildflowers into seed mixtures for disturbed land revegetation projects is widely known and accepted. However, further assessment of weed management approaches is a necessary step to successfully establish and produce native wildflower seed. We examined the impact of pre and post-emergence herbicides alone and in combination with hand weeding on 5 wildflower species [slender white prairie clover (Dalea candida(Michx). ex Willd), blanketflower (Gaillardia aristata Pursh), fuzzy tongue penstemon (Penstemon eriantherus Pursh var. eriantherus), silverleaf pha...; Download File | View full details

Design, fabrication, and testing of the van der Pauw piezoresistive structure for pressure sensing: Author: Cassel, Robert Douglas; Date: 2008-05-15; Program: Mechanical Engineering; Abstract: The project characterizes a piezoresistive sensor under variations of both size and orientation with respect to the silicon crystal lattice for its application to MEMS pressure sensing. The sensor to be studied is a four-terminal piezoresistive sensor commonly referred to as a van der Pauw (VDP) structure. The VDP sensor is used primarily in sheet resistance measurements, but has also been determined to be useful in determining the stress components at a point on (100) and (111) silicon wafer surfaces. In a previous study, our team has determined the relation between the biaxial stress state a...; Download File | View full details

Axial capacity of piles supported on intermediate geomaterials: Author: Brooks, Heather Margaret; Date: 2008-08-15; Program: Civil Engineering; Abstract: Pile foundations used to support bridges and other structures are designed and installed to sustain axial and lateral loads without failing in bearing capacity and without undergoing excessive movements. The axial load-carrying capacity of a driven pile is derived from friction or adhesion along the pile shaft and by compressive resistance at the pile tip. There are well established analytical methods for evaluating pile capacity and for predicting pile driving characteristics for cohesive soil, cohesionless soil, and rock. However, past experience indicates these methods may not be reliable f...; Download File | View full details

Integrated Management of Cercospora Leaf Spot on Sugar Beet: Author: Larson, Ben James; Date: 2004-05-15; Program: Plant Pathology; Abstract: Cercospora leaf spot (CLS), caused by Cercospora beticola, is the most important foliar disease of sugar beets in Montana. Losses in research plots ranging from 5-15 metric tons per hectare and 0.5-1.5% lower sugar in the last 7 years. Increased levels of storage rot, sugar impurities, and loss of sugar to molasses have also contributed to losses. Current management strategies are heavily dependent upon the application of a few registered fungicides. Continued use of these fungicides is threatened by registration removal through the Food Quality Protection Act of 1996, and the development of f...; Download File | View full details

Dead-Set Against It? Thoughts of Death Can Promote resistance to Attitude Change: Author: Dood, Tiffany Lee; Date: 2007-05-15; Program: Applied Psychology; Abstract: Terror Management Theory (TMT) argues that people experience an underlying sense of 'terror' when presented with their own mortality, causing them to more strongly defend their ideals (Greenberg, Pyszczynski, & Solomon, 2000). Although much support exists for this idea, prior research has not specifically investigated whether mortality reminders will enhance individuals' resistance to persuasive attempts that are counter to their existing attitudes. Thus, the purpose of the current study was to examine how reminders of individuals' mortality affect participants' attitudes towards persuasiv...; Download File | View full details

The Effects of Carbohydrate on Inflammation following an Acute Bout of resistance Exercise: Author: Pearson, Sherri Diane; Date: 2006-12-15; Program: Health and Human Development; Abstract: The immune response to inflammation involves the release of cytokines, which determine the intensity and duration of the immune response (Kuby, 1997). The cytokine interleukin-6 (IL-6), functions as a negative feedback signal that turns off pro-inflammatory mediators during the immune response. IL-6 also initiates the release of CRP, which induces inflammation. Therefore, IL-6 is known as both a pro and anti-inflammatory mediator of the immune response. IL-6 is released during the immune response to inflammation. IL-6 peaks about 8 hours after an eccentric exercise session that induces muscle...; Download File | View full details

Discovery and Distribution of Root Lesion Nematode, Pratylenchus neglectus, in Montana: Author: Johnson, Wendy Ann; Date: 2007-12-15; Program: Plant Pathology; Abstract: Root lesion nematodes (Pratylenchus neglectus and P. thornei) cause significant yield losses for wheat worldwide. To assess the prevalence of root lesion nematodes in Montana, soil samples were collected statewide in 2006 and 2007. In 2006, P. neglectus was found in 12 of the 17 counties and in 41% of all field samples surveyed. In 2007, P. neglectus was found in 11 of 15 counties and in 37% of all field samples surveyed. No P. thornei was found. For fields having root lesion nematode in 2006, P. neglectus mean population densities were 1213 nematodes/kg soil with population densities exceedin...; Download File | View full details

The Use of GPS to Predict Energy Expenditure for Outdoor Walking: Author: McKenzie, James Michael; Date: 2007-05-15; Program: Health and Human Development; Abstract: The purpose of this study was to determine the ability of GPS-reported position and elevation to estimate actual energy expenditure (EEACT) for outdoor walking. An accurate method for assessing EE in the field could greatly influence the scope of future studies of free-living activities. Thirteen subjects (8 male, 5 female) completed a 2303 m course of varying grades at slow and fast self-selected paces. Data from a portable metabolic unit was used to compare the GPS-predicted EE (EEGPS). Calculations of EEGPS were made by compiling an equation accounting for ground speed, grade, (Minetti, et ...; Download File | View full details

Rationalism and D. H. Lawrence: A 21st Century Perspective: Author: Rehan, Naveed; Date: 2004-05-15; Program: English; Abstract: Since the time of the Greek philosopher Plato, Western intellectuals have relied on logos or "the word" to make philosophical propositions about the world humans find themselves in. Logos or "the word" has generally been privileged over mythos or pathos, denoting emotion and feeling. This privileging has sometimes been challenged by intellectuals within the Western tradition. D. H. Lawrence was the most vocal and passionate writer to do so in modern times. This text traces the development of rationalism in the Western tradition and Lawrence's resistance to it. It also ...; Download File | View full details

African American Suffering and Suicide Under Slavery: Author: Kneeland, Linda Kay; Date: 2006-05-15; Program: History; Abstract: While the suffering of slaves in the antebellum American South is common knowledge, what is not so commonly known is the suicide rate among those slaves. How did slaves respond to the suffering they were forced to undergo? While some slaves did choose suicide, the rates appear to be surprisingly low. This is consistent with suicide rates for Africa and for people of African descent living in other areas of the world, and further supports the theory that a low suicide rate is an element of African culture. The overwhelming majority of African-American slaves chose to deal with their suffering t...; Download File | View full details

A descriptive study of childhood obesity monitoring practices used by Montana pediatric providers: Author: Schwarzkopf, Nancy Denise; Date: 2008-05-15; Program: Nursing; Abstract: INTRODUCTION: The global prevalence of childhood obesity is increasing. Overweight children face risks of compromised physical and mental well being, increased incidence of disease processes, and increased risk of adult obesity. Pediatric providers play a unique role in reversing the prevalence of obesity, yet there is little understanding of what practices are utilized to monitor children's weight. PROBLEM: Identifying children who are obese or are at risk for becoming obese may rely on evidence based weight monitoring practices. For many providers there may be a gap in knowledge regarding r...; Download File | View full details

Using Ecological Theory to Guide the Implementation of Augmentative Restoration: Author: Bard, Erin Christina; Date: 2004-05-15; Program: Land Resources and Environmental Sciences; Abstract: Invasive organisms are now considered the second worst threat to native biological biodiversity, behind habitat loss and fragmentation. Successful control of invasive plants can have unexpected impacts on native plants and wildland systems. Therefore, it is important for managers of invasive species to become increasingly concerned with more than target invaders, but also ecological mechanisms and processes like invasion resistance, environmental heterogeneity, and succession that direct plant community dynamics. Augmentative restoration is a management approach that augments existing ecologic...; Download File | View full details

Summer Diets of Sheep Grazing Spotted Knapweed-Infested Foothill Rangeland in Western Montana: Author: Thrift, Brian Douglas; Date: 2005-05-15; Program: Animal and Range Sciences; Abstract: Spotted knapweed (Centaurea biebersteinii DC.) is a perennial, invasive forb that infests millions of hectares of private and public rangelands in western North America. Previous research indicates that spotted knapweed is nutritious and readily grazed by domestic sheep (Ovis aries), but no studies have investigated prescription grazing of spotted knapweed within different levels of infestation or on a landscape scale. This two year study quantified the diets of a ewe-lamb band (n≈800 ewes, 1120 lambs) that prescriptively grazed spotted knapweed-infested foothill rangeland in western M...; Download File | View full details

Vegetative reproduction and the integrated management of Canada thistle: Author: Sciegienka, Joanna Katarzyna; Date: 2009-05-15; Program: Land Rehabilitation; Abstract: Canada thistle (Cirsium arvense (L.) Scop.) is an aggressive, introduced creeping perennial weed that flourishes in a wide variety of environments. Its deep, creeping root system and colony forming tendencies make it one of the most difficult weeds to control. A strategy that incorporates a better understanding of the biology of Canada thistle into the development of an integrated management plan that includes herbicides and biological control could help reduce the dispersal and impact of this species. The objectives of this work were to: 1) determine how Canada thistle emergence and growth ar...; Download File | View full details

Map-based Tests on Controls of Anabranch River Character on the Lower Yellowstone River: Author: Jenkins, Patricia Ann; Date: 2007-12-15; Program: Earth Sciences; Abstract: Processes responsible for the formation of anabranched river systems are poorly understood. The Yellowstone River, Montana, is a major unimpounded river with over 800 km of anabranched channel. There are from one to seven channels per reach. Current literature identifies at least seven variables that may influence anabranch river character: tributary junctions, bedrock lithology, vegetation, sediment pulses, debris/ice jams, water loss from stream (to groundwater or irrigation withdrawal) and tectonism. Two variables, tributary junctions, bedrock lithology (measured by relative bedrock hardnes...; Download File | View full details

Composition and Aleche: Native American Education, Scholarship and the Pedagogy of John Dewey: Author: Jenkins, Nathan Joseph; Date: 2005-05-15; Program: English; Abstract: This thesis approaches the historical and contemporary education of Native Americans in order to analyze and combat the American academic system's failure to educate Native students. The chapters cover 1) boarding schools aims and student resistance, 2) problems still faced by Native American students, and 3) possible solutions to these problems. Chapters 1 and 2 give an overview of history and research done by educators and scholars. Chapter 3 is a combination of suggestions by educators of Native students and John Dewey. The first sections demonstrate problems and voids in academia, and the ...; Download File | View full details

A Matter of Life and Death: Rethinking Evolution and the Nature of Science on Television: Author: Bard, Susanne Clara; Date: 2006-08-15; Program: Science and Natural History Filmmaking; Abstract: In a world where antibiotic resistance can make bacterial infections deadly and the HIV virus constantly mutates inside the human body, an understanding of evolution and its mechanisms is increasingly important. Yet much of the public is still either hostile to or misunderstands evolution and its mechanisms. Television provides the bulk of the general public's exposure to science once formal education has ended. The rhetorical strategies employed by much of science and evolution programming, along with an emphasis on content over process, delivers the message that science is a search for absol...; Download File | View full details

Enhancing the Antibiotic Susceptibility of Pseudomonas aeruginosa Biofilms by Quorum Sensing Inhibition: Author: Huff, Caol Philipp; Date: 2006-12-15; Program: Chemistry; Abstract: Biofilm forming bacteria are industrially and medically relevant organisms that are exceptionally resistant to garden variety antimicrobial treatments. This resistance is due in part to a biofilm forming bacteria's ability to sense and communicate with neighboring bacteria. As a result of this intercellular communication, bacteria are able to cooperate as a complex community. This communication system is used to modulate important facets of biofilm behavior and thus is an attractive target for biofilm control and potential antimicrobial agents. Inhibition of the molecular signaling system used...; Download File | View full details

X-ray characterization of buried layers and interfaces in EuO based spin-filter tunnel junctions: Author: Negusse, Ezana; Date: 2008-05-15; Program: Physics; Abstract: Spin filtering tunnel junctions provide a convenient method for controlling and manipulating the spin of electrons in spintronic devices. In a tunnel junction, the tunneling current depends exponentially on the thickness of the tunneling barrier. Ultrathin (~20 angstroms) barriers are highly desirable because they lower the junction resistance. In addition to the barrier thickness, the spin filtering efficiency of the junction depends on the tunneling barrier's magnetic properties and the nature of the barrier-electrode interfaces. EuO's high TC (69 K) and large exchange splitting (2 �...; Download File | View full details

Learning Tactics of Successful Online Learners: Author: Besich, Marilyn Ann; Date: 2005-05-15; Program: Education; Abstract: The relationship between locus of control and academic performance has been documented in numerous studies. However, there are very few studies that have been designed to investigate that relationship with online learners. Individuals with a strong internal locus of control are said to use resources in unique ways, are persistent, and generally reach the goals that they set for themselves. However, it is not known what specific tactics these individuals utilize in order to succeed. The purpose of this study was twofold. The first was to explore the relationship between internal locus of contro...; Download File | View full details

Drug Education for Rural Middle School Students in a Resilience Format: Author: Granger, Jamie Sue; Date: 2006-05-15; Program: Nursing; Abstract: Montana has the nation's youngest average age for first use of alcohol and marijuana. Montana also ranks among the top five states in the highest rates of alcohol use among youth. In one Montana county, 31% of eighth grade students report having had five or more drinks in a 30-day period, 14% were current cigarette smokers, and 12% smoked marijuana. The principal of a rural Montana middle school, in this same county, requested a drug education program for his sixth, seventh, and eighth grade students. The goal of the program was resilience education. Resilience education allows for the develop...; Download File | View full details

Study of Praseodymium Strontium Manganite for the Potential use as a Solid Oxide Fuel Cell Cathode: Author: Pfluge, Matthew Edward; Date: 2005-05-15; Program: Chemical Engineering; Abstract: Extensive research has been performed on solid oxide fuel cell cathodes. These cathodes must be stable in the oxidation environment and have sufficient electrical conductivity and catalytic activity for the oxidant gas reaction at the appropriate operating temperature. Also, the cathode must be chemically and thermally compatible with the other cell components at room temperature, operating temperatures, and higher fabrication temperatures. Praseodymium strontium manganite (PSM) has shown promising electrical properties with respect to ideal properties of cathodes in solid oxide fuel cells. Va...; Download File | View full details

View next 25 results

Back to search page

print-friendly page | mobile-friendly page