Index Catalog // ScholarsArchive@OSU

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Creator:: Marks, Jade A.
Abstract:: Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....
Resource Type:: Masters Thesis
Full Text:: Journal, 42(3): 412-415. Johansson, O., Olofsson, J., Giesler, R., Palmqvist, K., 2011. Lichen Responses

Genotype-environment interaction and phenotypic stability of selected winter wheats (Triticum aestivium L. em Thell)

Creator:: Larson, Mark J., 1962-
Abstract:: Extensive research has been devoted to evaluating potential genotype-environment interactions. However, plant breeders are still in need of a simple way to describe how genotypes respond to different locations and years. In an environmentally diverse state like Oregon, significant genotype-environment interactions do occur The resulting lack of association between actual...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark Larson for the degree of

Effect of Brassicaceae seed meals with different glucosinolate profiles on Rhizoctonia root rot in wheat

Creator:: Handiseni, Maxwell, Brown, Jack, Zemetra, Robert, and Mazzola, Mark
Abstract:: The soil-borne pathogen Rhizoctonia solani AG 8 causes major yield losses in wheat (Triticum aestivum. L) production worldwide. Plant tissues of Brassicaceae species contain glucosinolates that are hydrolyzed in the presence of the enzyme myrosinase into products with pesticidal properties. Growth chamber studies were conducted to determine the effect of...
Resource Type:: Article
Full Text:: wheat Maxwell Handiseni a,*, Jack Brown a, Robert Zemetra b, Mark Mazzola c aDepartment of Plant Soil

Persistence of aromatic compounds in soils and sediments : a molecular perspective

Creator:: Keiluweit, Marco
Abstract:: This thesis explores open questions regarding molecular forms and interactions of natural and synthetic aromatic compounds present in soils and sediments. Plant biomass-derived black carbon (biochar) generated through incomplete natural and anthropogenic combustion processes is a major source of aromaticity in terrestrial ecosystems. Chapter one represents a detailed account of...
Resource Type:: Masters Thesis
Full Text:: members Jennifer A. Field and Mark G. Johnson. I also thank Fredrick G. Prahl and Margret A. Sparrow for

Spatial variability of dust deposition in the Luquillo Mountains, Puerto Rico

Creator:: McClintock, Matthew
Abstract:: Dust deposition on ecosystems with highly weathered soils may provide vital rock-derived nutrients that maintain ecosystem productivity. Because of the difficulties in measuring temporally and spatially heterogeneous dust deposition over ecologically meaningful timescales, evaluations of the spatial variability in dust deposition are extremely rare. In the Luquillo Mountains of Puerto...
Resource Type:: Masters Thesis

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:: toward my committee, Mark Johnson, Maria Dragila, and Jeff Jenkins. Thank you for always being

Exploring Vitamin B9 Diversity for the Nutritional Improvement of Potato

Creator:: Robinson, Bruce R.
Abstract:: The cultivated potato, Solanum tuberosum L., has been one of the world’s most important food crops for more than 190 years and may become even more important to global food security in the coming 20 - 30 years. One of the world's largest growing health concerns is not just the...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Bruce R. Robinson for the degree of Master of Science in Crop Science

Cultural controls for suppressing Phytophthora cinnamomi root rot of blueberry

Creator:: Yeo, John R.
Abstract:: Phytophthora cinnamomi is a soilborne pathogen that causes root rot disease of highbush blueberry (Vaccinium corymbosum L.). When new installations of susceptible blueberry cultivars are infected with P. cinnamomi, plants often fail to grow significant new tissue, greatly reducing yields over the life of the planting. Chemical fungicides are available...
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF John R. Yeo for the degree of Doctor of Philosophy in Soil Science presented

Soil quality dynamics in an integrated reduced-tillage and cover-cropped vegetable agroecosystem

Creator:: Banners, Candace R.
Abstract:: Soil response and function were investigated following the adoption of an integrated reduced-tillage and cover-cropped vegetable system in the Willamette Valley of Western Oregon. The experiment was conducted over three cropping seasons (2002-2004) at the Oregon State University Vegetable Research Farm (Corvallis, OR). The design was a randomized complete-block with...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Candace R. Banners for the degree

Nitrogen management and variety selection for dryland production of hard red winter wheat in northeastern Oregon

Creator:: Jepsen, Daniel R.
Abstract:: Proper nitrogen (N) management and variety selection are important for profitable hard red winter (HRW) wheat production in the dryland growing regions of northeastern Oregon. In these dryland systems, N management for grain yield and grain protein concentration (GPC) is challenging due to climatic and year-to-year variation in production environments....
Resource Type:: Masters Thesis
Full Text:: Daniel R. Jepsen for the degree of Master of Science in Crop Science presented on March 17, 2010

ScholarsArchive@OSU

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Genotype-environment interaction and phenotypic stability of selected winter wheats (Triticum aestivium L. em Thell)

Effect of Brassicaceae seed meals with different glucosinolate profiles on Rhizoctonia root rot in wheat

Persistence of aromatic compounds in soils and sediments : a molecular perspective

Spatial variability of dust deposition in the Luquillo Mountains, Puerto Rico

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

Exploring Vitamin B9 Diversity for the Nutritional Improvement of Potato

Cultural controls for suppressing Phytophthora cinnamomi root rot of blueberry

Soil quality dynamics in an integrated reduced-tillage and cover-cropped vegetable agroecosystem

Nitrogen management and variety selection for dryland production of hard red winter wheat in northeastern Oregon

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