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Morphology, genesis, and classification of soils forming in recent age tephra deposits from Mt. St. Helens volcano

Creator:: Johnson, Mark E.
Abstract:: The morphology, genesis, and classification of soils forming in multiple tephra deposits of recent age from Mt. St. Helens volcano in southwestern Washington Cascade Mountains was studied. Soils which occupied well drained and poorly drained positions on the landscape were characterized according to their morphology and the results of analyses...
Resource Type:: Masters Thesis
Full Text:: in Recent Age Tephra Deposits From Mt. St. Helens Volcano AN ABSTRACT OF THE THESIS OF Mark E

Plant community and soil relationships on some rangelands of northeastern Nevada

Creator:: Jensen, Mark E.
Abstract:: Relationships between sagebrush-dominated plant communities and soil-site characteristics were examined on 372 relatively undisturbed rangeland sites of the Humboldt National Forest, in northeastern Nevada. Plant species production data were analyzed by TWINSPAN to develop a hierarchical, floristic-based community type (C.T.) classification. Seventeen C.T.s were identified in this analysis and named...
Resource Type:: Dissertation
Full Text:: of northeastern Nevada AN ABSTRACT OF THE THESIS OF Mark E. Jensen for the degree of Doctor of

Incinerated sewage sludge use as a soil amendment for sweet corn (Zea mays L.)

Creator:: Mellbye, Mark Edward
Abstract:: Field and greenhouse experiments were conducted to determine the suitability of using incinerated sewage sludge ash as a soil amendment for sweet corn production on Willamette silt loam. In 1977, field plots were treated with 0, 11, 22, and 43 mt/ha of ash containing lime, in factorial combination with a...
Resource Type:: Masters Thesis
Full Text:: sweet corn (Zea mays L.) AN ABSTRACT OF THE THESIS OF Mark Edward Mellbye for the degree of Master of

Phosphorus characterization in Sri Lankan Alfisols : Soprition, fractions, plant availability and soil test suitablitiy

Creator:: Sattell, Robert R.
Abstract:: Twelve Sri Lankan Alfisols were characterized for P. Soils were incubated for three weeks with sufficient P applied (P2) to elevate soil solution P to 0.2 ug P/g solution as determined by sorption curves, with 75 percent of P2 (P1), and without P (P0). For PO treatments, (a) organic P,...
Resource Type:: Masters Thesis
Full Text:: : Soprition, fractions, plant availability and soil test suitablitiy AN ABSTRACT OF THE THESIS OF Robert R

Techniques for identifying flood plains in Oregon

Creator:: Reckendorf, Frank Fred
Abstract:: Seven methods for delineating flood plains were evaluated. The methods are classified : (1) Geomorphic Technique; (2) Soils Technique; (3) Botanical Technique; (4) Hydrologic Technique; (5) Hydrologic- Hydraulic Technique; (6) Historical Technique; and (7) "Combination Method". All of the methods, except the Botanical Technique and the Hydrologic-Hydraulic Technique, were compared...
Resource Type:: Dissertation

Genesis of some soils in the central western Cascades of Oregon

Creator:: Brown, R. B.
Abstract:: Soils representative of several landscape units in the H. J. Andrews Experimental Forest, Western Cascade Range, were sampled, analyzed, and tentatively classified. Genetic inferences were drawn relating soils to landscape position and other factors of soil formation. Descriptive information and nutrient capital data were provided to support ecosystem modelling efforts...
Resource Type:: Masters Thesis
Full Text:: Privacy Professor of Forest Soils r / in charge of major Redacted for Privacy (Head Department of Soil

Influences of phosphate on the growth and nodulation characteristics of Rhizobium trifolii

Creator:: Leung, Kam-tin
Abstract:: Nodulation success by two indigenous Rhizobium trifolii serogroups, 6 and 36, on subterranean clover (Trifolium subterraneum L.) was affected by the addition of phosphate to Abiqua soil (Ultic Haploxeroll). To understand the impact of phosphorus nutrition on the survival and nodulation characteristics of the two serogroups, studies were carried out...
Resource Type:: Masters Thesis
Full Text:: different iron oxides at pH 5.2. 27 2. Growths of R. trifolii strains 6 and 36 under P-rich and P-depleted

Phosphorus response and critical phosphorus levels of winter wheat varieties in western Oregon

Creator:: Sullivan, Dan M. (Dan Matthew), 1954-
Resource Type:: Masters Thesis
Full Text:: tillering, while leaf P decreased mark- edly in P fertilized plants between early tillering (Feekes 2-3

Land use distributions and changes in the Willamette Valley in relation to soil characteristics

Creator:: Wiens, John Herbert
Abstract:: A study was undertaken in the Willamette Valley, Oregon, to document 1971 land use patterns as well as land use change in a smaller study area in the 16 years prior, and to relate these to soil characteristics. Quantification of these inter-relationships was aided by use of computer tabulation and...
Resource Type:: Dissertation
Full Text:: . Appreciation is expressed to Drs. H. Huddleston, R. Peterson, E. Taylor and D. Zobel for their willingness to

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Creator:: Black, C. H. (Charles H.)
Resource Type:: Dissertation
Full Text:: . 25 LITERATURE CITED Barnard, E. L. and J. R. Jorgenson. 1977. Respiration of field grown loblolly

ScholarsArchive@OSU

Morphology, genesis, and classification of soils forming in recent age tephra deposits from Mt. St. Helens volcano

Plant community and soil relationships on some rangelands of northeastern Nevada

Incinerated sewage sludge use as a soil amendment for sweet corn (Zea mays L.)

Phosphorus characterization in Sri Lankan Alfisols : Soprition, fractions, plant availability and soil test suitablitiy

Techniques for identifying flood plains in Oregon

Genesis of some soils in the central western Cascades of Oregon

Influences of phosphate on the growth and nodulation characteristics of Rhizobium trifolii

Phosphorus response and critical phosphorus levels of winter wheat varieties in western Oregon

Land use distributions and changes in the Willamette Valley in relation to soil characteristics

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

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