Index Catalog // ScholarsArchive@OSU

Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

Creator:: Chaer, Guilherme M.
Abstract:: The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to...
Resource Type:: Dissertation
Full Text:: regression analyses expressed such equilibrium in an equation able to explain 97% of the total soil N based

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

Creator:: Brewer, Elizabeth Ann
Abstract:: Changes in the type and amount of plant inputs can occur gradually, as with succession, or rapidly, as with harvesting or wildfire. With global change it is anticipated that both gradual and immediate scenarios will occur at increasing frequency. Changes in vegetation inputs alter the quality and quantity of soil...
Resource Type:: Dissertation
Full Text:: bacterial communities were influenced by spatial heterogeneity. Soil microbial N cycling was

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Creator:: Boyle, Stephanie A.
Abstract:: The objectives of this thesis were to examine the links between soil microbial community composition and function using the nitrogen (N) cycle as a model for these interactions and to assess the impact of environmental factors such as microclimate, vegetation type, and nutrient availability on microbial diversity and N transformations...
Resource Type:: Dissertation
Full Text:: examine the links between soil microbial community composition and function using the nitrogen (N) cycle

Effects of green manures on verticillium wilt of potatoes and on soil properties related to disease suppression

Creator:: Ochiai, Naoyuki
Abstract:: Increasing regulation and costs of soil fumigation to manage diseases such as Verticillium wilt caused by soil-borne pathogens have prompted a search for management alternatives. Single-year microplot experiments were conducted in 2002 and 2003 in central Oregon to evaluate the effects of Austrian winter pea, broccoli, and Sudan grass green...
Resource Type:: Masters Thesis
Full Text:: treatments. In 2003, after accounting for different levels of ID, inclusion of a term for NO3-N, microbial

Quantitative resistance to Puccinia striiformis f. sp. hordei in barley near-isogenic (BISON) lines

Creator:: Richardson, Kelley L.
Abstract:: Quantitative resistance (QR) to disease is usually more durable than qualitative resistance, but its genetic basis is not well understood. We used the barley/barley stripe rust pathosystem as a model for the characterization of the QR phenotype and associated genomic regions. As an intermediate step in the preparation of near-isogenic...
Resource Type:: Dissertation
Full Text:: of resistance to Puccinia striiformis f. sp. hordei recorded in barley (Osman-Ghani and Manners

Testing the effectiveness of barley stripe rust resistance QTL detected in Mexico and the USA against a possible new race in Peru and mapping of genes conferring resistance to leaf rust and mildew in the same population

Creator:: Rossi, Carlos
Abstract:: Barley is the fourth most important cereal crop in the world because of its broad adaptation, its utility as a feedstock and for human food, and the superior properties of barley malt for brewing. Three of the most important foliar diseases of barley, on a worldwide level are: barley leaf...
Resource Type:: Masters Thesis
Full Text:: sporulation rate between cultivars were clear, with few or slight cultivar-isolate interactions (Osman

Evaluating Field Production Issues by Investigating Grain Dormancy and Plant Segregation Patterns in Soft White Winter Wheat

Creator:: McCarthy, Christy A.
Abstract:: Wheat (Triticum aestivum) is a highly valuable crop that makes up a large portion of the world’s food. However, breeding for improved varieties with desirable characteristics can be a challenge. This research examined two different issues wheat breeders deal with throughout the selection process all the way to production of...
Resource Type:: Masters Thesis
Full Text:: . Hart, J. M., M. D. Flowers, N. P. Anderson, R. J. Roseberg, N. W. Christensen, M. E. Mellbye (2011

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

Creator:: Almquist, Vance Warner
Abstract:: This dissertation reports on four related, though separate projects. The first project details the process of carrying out a digitally augmented soil mapping (DSM) effort alongside an ongoing survey in Oregon's Ochoco National Forest (ONF) using a Random Forest algorithm. The second chapter describes a initial soil survey in Oregon's...
Resource Type:: Dissertation
Full Text:: Mazama ash is most extensive on N-NE slopes, frequently within colluvial depressions regardless of

Duration of saturation and redox potentials in selected Willamette Valley soils

Creator:: Austin, Will
Resource Type:: Masters Thesis
Full Text:: and reduced substances o = reduced species oxidized species n is number of transferred electrons F

Differential sensitivity of Italian ryegrass and rice cultivars to fenoxaprop

Creator:: Hassan, Gul
Resource Type:: Dissertation
Full Text:: research in Pakistan and Kazim Shah for his help in conduct of experiments. The help of Khalid Osman and

ScholarsArchive@OSU

Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

Response of soil microbial communities and nitrogen cycling processes to changes in vegetation inputs

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Effects of green manures on verticillium wilt of potatoes and on soil properties related to disease suppression

Quantitative resistance to Puccinia striiformis f. sp. hordei in barley near-isogenic (BISON) lines

Testing the effectiveness of barley stripe rust resistance QTL detected in Mexico and the USA against a possible new race in Peru and mapping of genes conferring resistance to leaf rust and mildew in the same population

Evaluating Field Production Issues by Investigating Grain Dormancy and Plant Segregation Patterns in Soft White Winter Wheat

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

Duration of saturation and redox potentials in selected Willamette Valley soils

Differential sensitivity of Italian ryegrass and rice cultivars to fenoxaprop

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