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Adsorption of Cu(II) and Cd(II) by Na-montmorillonite at low surface coverage in the presence and absence of water soluble complexing organic ligands

Creator:: Inskeep, William Parks
Abstract:: The formation of solution and solid complexes with heavy metals will partially determine their mobility and plant availability in soil systems. Experiments were initiated to determine the effect of pH, adsorbent and initial metal concentrations, and the presence of water soluble ligands on the adsorption of Cd and Cu by...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy John Baham The formation of solution and solid complexes with heavy metals will

Association of hydrophobic organic compounds with dissolved soil organic carbon

Creator:: Ochs, Michael
Abstract:: Volatile hydrophobic compounds (HOCs) brought into soil and sediment systems represent a serious threat to the environment. Dissolved organic carbon (DOC) may exert an important influence over the total aqueous solubility and mobility of organic pollutants through their incorporation into micelles or the formation of soluble complexes. To date, however,...
Resource Type:: Masters Thesis
Full Text:: Dissolved Soil Organic Carbon. Redacted for Privacy Abstract approved: John Baham Volatile hydrophobic

Low molecular weight organic acids in forest soils

Creator:: Hayden, John
Abstract:: Two studies concerning low molecular weight organic acids in soils were conducted. In the first study, anion exclusion chromatography was used to separate and identify 12 common organic acids, and the accuracy, precision and detection limits of the method were determined. The method was found to be sensitive and accurate...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF John Hayden for the degree of

Effects of nitrogen applied on wheat straw on winter wheat (Triticum aestivum L.) yields in western Oregon

Creator:: Caputo, John Anthony
Abstract:: Nitrogen deficiency during the winter where winter wheat (Triticum aestivum L.) follows wheat and large amounts of straw have been plowed down has been a factor limiting yield in the Willamette Valley of western Oregon. Field experiments were established to determine if an application of N on the stubble or...
Resource Type:: Masters Thesis
Full Text:: wheat (Triticum aestivum L.) yields in western Oregon AN ABSTRACT OF THE THESIS OF John Anthony

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Creator:: Phillips, Michael John
Abstract:: To obtain data on the decomposition of the forest floor, a battery operated electrolytic respirometer was developed making it possible to measure CO₂ evolution from field moist forest floor samples in situ independent of root respiration. Banks of four respirometers powered by two 12-volt batteries were installed in three old...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael John Phillips for the

Winter wheat response to nitrogen, phosphorus, sulfur, and zinc supplied by municipal biosolids

Creator:: Shearin, Todd E.
Resource Type:: Masters Thesis
Full Text:: Dr. Neil Christensen for suggestions and instruction on soil fertility. To Dr. John Hart for help on

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Creator:: Salisbury, Steven Earl
Abstract:: Winter wheat is commonly grown in rotation with leguminous and non-leguminous crops in the Willamette Valley. For agronomic, economic, and environmental reasons it is important to understand the influence of previous crops on availability of N and other nutrients. Objectives of this study were: (1) to evaluate the effects of...
Resource Type:: Masters Thesis
Full Text:: . He is an excellent advisor and a good friend. John Hart, who served as a committee member, for

Evaluation of soil and plant analyses as components of a nitrogen monitoring program for silage corn

Creator:: Marx, Ernest S.
Resource Type:: Masters Thesis
Full Text:: from my own mistakes. His patience and investment of time are greatly appreciated. John Hart, who

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:: . David Myrold, Dr. John Selker, and Dr. Kenneth Johnson, for all of their helpful suggestion and

Symbiotic characteristics of Rhizobium leguminosarum bv. trifolii recovered from nodules of field-grown Trifolium subterraneum L.

Creator:: Wanjagi, Francis Ndung'u
Abstract:: In a series of greenhouse experiments, isolates representing serotypically distinct subpopulations of Rhizobium leguminosarum bv. trifolii recovered from root nodules of field-grown subclover Trifolium subterraneum cv. "Nangeela"), were evaluated for their symbiotic effectiveness potential, their effect on regrowth potential of subclover, and for their competitive abilities to form nodules. Isolates...
Resource Type:: Masters Thesis
Full Text:: compilation of this thesis. Thanks also to Drs. Neil Christensen, John Rohovec, and Barry Sherr for

ScholarsArchive@OSU

Adsorption of Cu(II) and Cd(II) by Na-montmorillonite at low surface coverage in the presence and absence of water soluble complexing organic ligands

Association of hydrophobic organic compounds with dissolved soil organic carbon

Low molecular weight organic acids in forest soils

Effects of nitrogen applied on wheat straw on winter wheat (Triticum aestivum L.) yields in western Oregon

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Winter wheat response to nitrogen, phosphorus, sulfur, and zinc supplied by municipal biosolids

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Evaluation of soil and plant analyses as components of a nitrogen monitoring program for silage corn

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

Symbiotic characteristics of Rhizobium leguminosarum bv. trifolii recovered from nodules of field-grown Trifolium subterraneum L.

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