Index Catalog // ScholarsArchive@OSU

Nitrogen fixation and cycling in a mixture of young red alder and Douglas-fir

Creator:: Tang, James Y.
Resource Type:: Masters Thesis
Full Text:: a Mixture of Young Red Alder and Douglas-fir Abstract approved: David D. Myrold Red alder (Alnus

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Creator:: Fernandes, Marcelo Ferreira
Abstract:: A method based on fatty acid (FA) analysis is used to profile microbial community structure (MCS). Various extraction protocols are available, which alter the types of FAs extracted from soils. The more time consuming but widely used protocol extracts only FAs from phospholipids (PLFA). This technique is desirable because PLFAs...
Resource Type:: Dissertation
Full Text:: . Abstract approved: Richard P. Dick

Sulfur oxidation and rhodanese activity in soils

Creator:: Deng, Shiping
Resource Type:: Masters Thesis
Full Text:: : Redacted for privacy Richard P. Dick Elemental S (S°) is an economical source of sulfur fertilizer but

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: Abstract approved: Richard P. Dick Two native shrub species (Piliostigma reticulatum and Guiera

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:: approved: Richard P. Dick The Oregon Long-Term Soil Quality Project was initiated to identify soil

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: approved: Richard P. Dick Activities of 11 enzymes were measured on samples collected from two

Interactions between microbial dynamics and transport processes in soils

Creator:: Rockhold, Mark L.
Abstract:: An experimental and numerical modeling investigation was conducted to study interactions between microbial dynamics and transport processes in variably saturated porous media. These interactions are important in a variety of applied problems such as water and wastewater treatment, bioremediation, and oil-field recovery operations. These processes and interactions also have great...
Resource Type:: Dissertation
Full Text:: single-phase Richards equation. Solute and bacterial transport, cell growth, substrate consumption, and

Remediation of atrazine in irrigation runoff by a constructed wetland

Creator:: Runes, Heather B.
Abstract:: Due to its frequent use in agriculture and its frequent detection in surface water, atrazine was chosen as a model compound to study the treatment capability of a surface flow wetland used to remediate irrigation runoff at a container nursery near Portland, Oregon. Further evaluation of treatment of atrazine was...
Resource Type:: Dissertation
Full Text:: a 7-d period ranged from 16 to 24% and several degradation products (deethylatrazine (DEA

Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Creator:: Hesse, Cedar N.
Abstract:: Mat-forming ectomycorrhizal (EcM) fungi represent a prevalent constituent of many temperate forest ecosystems and create dramatic changes in soil structure and chemistry. EcM mat soil have been shown to have increased microbial respiration rates and have been hypothesized to harbor unique assemblages of fungi and bacteria. The objectives of this...
Resource Type:: Dissertation

Heat flow results from plate boundary observatory boreholes in California

Creator:: McDonald, Kyle Joseph
Abstract:: An integral component to understanding lithospheric rheology, fault mechanics, and geodynamic processes is knowledge of the subsurface thermal regime. This study presents thermal data from 26 new borehole sites drilled during the installation of borehole strain meters as part of the Plate Boundary Observatory (PBO). These data extends existing coverage...
Resource Type:: Masters Thesis
Full Text:: published values (blue), and previous values corrected for 3-D effects of terrain (grey) by Williams et al

ScholarsArchive@OSU

Nitrogen fixation and cycling in a mixture of young red alder and Douglas-fir

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Sulfur oxidation and rhodanese activity in soils

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

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

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Interactions between microbial dynamics and transport processes in soils

Remediation of atrazine in irrigation runoff by a constructed wetland

Characterization of fungal and bacterial communities associated with mat-forming ectomycorrhizal fungi from old-growth stands in the H.J. Andrews Experimental Forest

Heat flow results from plate boundary observatory boreholes in California

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