Index Catalog // ScholarsArchive@OSU

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

Creator:: Davis, Kimberly J.
Abstract:: Many studies suggest that weedy plant species are most successful when soil nitrogen in abundant. Consequently, I used soil nitrogen manipulations to determine if altering nitrogen would affect the establishment of both weedy and native plant species in a western Oregon wetland prairie. In two studies, we added carbon amendments...
Resource Type:: Dissertation
Full Text:: members, Kate Lajtha, Don Zobel, David Myrold, Jeff Steiner, and Jack DeAngelis for their valuable

Long-term Effects of Vegetation Management on Plant and Soil Derived Nutrient Budgets for Plantations of Four Western Conifer Species

Creator:: Callan, Cannon F.
Abstract:: Forest Vegetation Management (VM) is an important tool used in the Pacific Northwest (PNW) for reforestation. It has been well documented that VM increases seedling survival and crop tree volume growth. What is less understood, is how altering the plant community and successional trajectory affects the way the ecosystem uses...
Resource Type:: Masters Thesis
Full Text:: possible outcomes of various silvicultural treatments labeled A-F. Adapted from Haas and Rose (1995) and

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Creator:: Holub, Scott M.
Abstract:: Forests in the Pacific Northwest receive very little nitrogen through atmospheric deposition and thus studying the nitrogen cycle in this region can provide insights into how the unpolluted nitrogen cycle functions. I examined the fate of organic nitrogen versus inorganic nitrogen and the effect of tamlins on N retention by...
Resource Type:: Dissertation
Full Text:: , J.A. Downing, R. Elmgren, N. Caraco, T. Jordan, F. Berendse, J. Freney, V. Kudeyarov, P. Murcoch, and

Environmental Stressors Influence Fabaceae Seedling Development

Creator:: Gerber, Kaitlin A.
Abstract:: Sites in need of restoration typically have one or more environmental factors that limit seedling establishment; identifying ecophysiological responses to environmental stressors can be advantageous in growing seedlings able to overcome such constraints on survival. To maximize survival after outplanting, seedlings should be grown in a manner that considers both...
Resource Type:: Masters Thesis
Full Text:: . Gerber, Author ACKNOWLEDGEMENTS I want to extend my thanks to Don Regan and the University

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Creator:: Chacon, Stephany S.
Abstract:: The bottleneck in the turnover of soil organic matter (SOM) is the conversion of large molecular compounds into smaller compounds that can be transported through a cell membrane of a microbe for processing. Once inside the cell, organic compounds can be converted into biomass or be respired. The microbial depolymerization...
Resource Type:: Dissertation
Full Text:: Published In: Soil Biology and Biochemistry Elsevier Inc. 1600 John F Kennedy Boulevard Suite 1800

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

Creator:: Grossmann, Emilie B.
Abstract:: I conducted two separate studies, both related to the impacts of spring and fall prescribed fire on ponderosa pine (Pinus ponderosa Dougl. ex Loud.) forest soils in Eastern Oregon. The studies were either conducted at or linked to four stands of ponderosa pine, in the Malheur National Forest. Each stand...
Resource Type:: Masters Thesis
Full Text:: between the spring and 14 fall burns (Figure 2e,f, Table 3). The models describing the concentration

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Creator:: Nelson, Machelle A.
Abstract:: A better understanding of grass seed crop and soil fertility is necessary to improve fertilizer practices and preserving water quality in Willamette Valley, Oregon, where 55% of land-use is in grass seed production that directly impacts adjacent waterways containing native protected fish species. I determined tillage effects on soil N...
Resource Type:: Masters Thesis
Full Text:: criticisms. In particular, I would like to acknowledge Don Streeter, Bill Gavin, and Kristine Reid at the

Evaluating Biochar for the Sustainable Treatment of Heavy Metals in Stormwater: Characteristics, Mechanisms, and Barriers

Creator:: Burch, Sarah
Abstract:: Heavy metals, such as copper, zinc, and cadmium, are ubiquitous in stormwater and potentially toxic to aquatic organisms at low concentrations. Removal of heavy metals contamination by conventional treatment is expensive and does not always reduce metals concentrations low enough to ensure safety of all aquatic species. This research seeks...
Resource Type:: Dissertation
Full Text:: ; ( ) represent molar concentration; F = Faraday constant (96,500 C/mol); A = specific surface area (m2/g); S

Hydrocortisone permeation study using a synthetic membrane, mouse skin and an epiderm cultured skin, Preparation of orally disintegrating tablets of melatonin and acetaminophen, Pharmacokinetics of terbinafine in penguins

Creator:: Le, Hang Thi
Abstract:: The first project of this thesis is an in vitro study. This study was performed with 8 hydrocortisone topical products on the market for the purpose of comparing one Tec Lab product, a Corticool gel, to the other seven common products on the market. The permeation of these products was...
Resource Type:: Dissertation

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: . John Wiley and Sons, Chichester, UK. Granatstein, D., and D. F. Bezdicek. 1992. The need for a soil

ScholarsArchive@OSU

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

Long-term Effects of Vegetation Management on Plant and Soil Derived Nutrient Budgets for Plantations of Four Western Conifer Species

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Environmental Stressors Influence Fabaceae Seedling Development

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Evaluating Biochar for the Sustainable Treatment of Heavy Metals in Stormwater: Characteristics, Mechanisms, and Barriers

Hydrocortisone permeation study using a synthetic membrane, mouse skin and an epiderm cultured skin, Preparation of orally disintegrating tablets of melatonin and acetaminophen, Pharmacokinetics of terbinafine in penguins

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

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