Index Catalog // ScholarsArchive@OSU

Geostatistical applications to salinity mapping and simulated reclamation

Creator:: Al-Taher, Mohamad A.
Abstract:: Geostatistical methods were used to find efficient and accurate means for salinity assessment using regionalized random variables and limited sampling. The random variables selected, sodium absorption ratio (SAR), electrical conductivity (EC), and clay content were measured on samples taken over an area of fifteen square miles. Ordinary kriging and co-kriging...
Resource Type:: Dissertation
Full Text:: conductivity (EC), and clay content were measured on samples taken over an area of fifteen square miles

Development of predictive mapping techniques for soil survey and salinity mapping

Creator:: Elnaggar, Abdelhamid A.
Abstract:: Conventional soil maps represent a valuable source of information about soil characteristics, however they are subjective, very expensive, and time-consuming to prepare. Also, they do not include explicit information about the conceptual mental model used in developing them nor information about their accuracy, in addition to the error associated with...
Resource Type:: Dissertation
Full Text:: capacity (FC), pH and EC values

Soil biological indices and nitrogen availability during a simulated transition from inorganic to organic sources of nitrogen

Creator:: Fauci, Mary F.
Resource Type:: Masters Thesis
Full Text:: enzymes responsible for hydrolysis of proteins is called proteases (peptide hydrolases, EC 3.4). Over 90

Measuring Electron Activity to Constrain the Role of Soil Structure in the Formation of Biogeochemical Heterogeneity

Creator:: Wanzek, Thomas
Abstract:: Soils have a critical role in global carbon (C) cycling, containing one of the largest fast-cycling carbon stocks on earth. Robust representation of soil organic matter dynamics in Earth System Models is critical for future climate prediction. Current C cycling models assume that all C cycling in non-hydric (i.e. ‘upland’)...
Resource Type:: Masters Thesis
Full Text:: El ec tro m ot iv e Po te nt ia l ( m V) NO-3/N2 +805 +704 MnO2/Mn 2+ +521 Fe3+/Fe2

The Impact of Freeze-Thaw Cycles to the Physical and Biogeochemical Properties of Alaskan Permafrost Soils

Creator:: Rooney, Erin C.
Abstract:: Arctic warming is exposing thawing permafrost to repeated freeze-thaw, a disruptive process that can alter soil biogeochemistry and physical structure. To investigate the impact of permafrost exposure to freeze-thaw, soil response was tested across three scales: 2.5 cm³ aggregates, a forested hillslope, and two sites at contrasting latitudes. XCT imaging...
Resource Type:: Dissertation

Sediment, phosphorus and nitrogen in storm runoff from some Willamette Valley croplands

Creator:: Simmons, F. William
Resource Type:: Masters Thesis

The reactions of picloram and 2, 4-D with montmorillonite clays and soils

Creator:: Kuo, Eugene Cheng-yen
Resource Type:: Dissertation

The development and decline dynamics of two ectomycorrhizal fungal mat soil microbial communities in response to a reciprocal soil transfer experiment in old-growth Douglas-fir forests

Creator:: Cappellazzi, Jed E.
Abstract:: Ectomycorrhizal fungi (EmF) form symbioses with trees. These symbioses profoundly influence forest ecology. Certain EmF form specialized profusions of hyphae, known as ectomycorrhizal fungal mats (mats) which are visible to the naked eye, alter forest soil biogeochemistry, substantially contribute to soil microbial biomass/respiration and support unique microbial communities. Piloderma and...
Resource Type:: Masters Thesis

Turbidity in Prineville Reservoir as related to soils and hydrology

Creator:: Silvernale, Clair Ellwood
Abstract:: Persistent levels of high turbidity in the outflow from the Prineville Reservoir led to development of relationships between watershed soils, land use, and resource management and water quality in the Upper Crooked River, Central Oregon. Seven stations, strategically located for measurement of runoff volume and water sample collection, were established...
Resource Type:: Masters Thesis
Full Text:: conductivity. The modification was used because it recovered only those exchangeable cations (EC) that would

Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen, phosphorus, and sulfur

Creator:: Christ, Robert A.
Resource Type:: Masters Thesis
Full Text:: . 29 50 40 0 0_ Ec:3) 30 w Y < 20I a_ D Z 10 0 30 60 90 120 TIME (days) Fig. 1.2

ScholarsArchive@OSU

Geostatistical applications to salinity mapping and simulated reclamation

Development of predictive mapping techniques for soil survey and salinity mapping

Soil biological indices and nitrogen availability during a simulated transition from inorganic to organic sources of nitrogen

Measuring Electron Activity to Constrain the Role of Soil Structure in the Formation of Biogeochemical Heterogeneity

The Impact of Freeze-Thaw Cycles to the Physical and Biogeochemical Properties of Alaskan Permafrost Soils

Sediment, phosphorus and nitrogen in storm runoff from some Willamette Valley croplands

The reactions of picloram and 2, 4-D with montmorillonite clays and soils

The development and decline dynamics of two ectomycorrhizal fungal mat soil microbial communities in response to a reciprocal soil transfer experiment in old-growth Douglas-fir forests

Turbidity in Prineville Reservoir as related to soils and hydrology

Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen, phosphorus, and sulfur

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