Index Catalog // ScholarsArchive@OSU

Soil quality assessment of Willamette Valley soils and root colonization potential by arbuscular mycorrhizal fungi

Creator:: Allen, Natalie M.
Abstract:: Interest in measuring soil quality continues to increase worldwide in view of demands on land productivity and the necessity to preserve soil resources, yet identification of suitable indicators for soil quality assessment is still evolving. This study adapted 10 biological, physical, and chemical indicators of soil quality identified by the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Natalie M. Allen for the

Response of Striga-susceptible and Striga-resistant sorghum genotypes to soil phosphorus and colonization by an arbuscular mycorrhizal fungus

Creator:: Leytem, Alicia B.
Abstract:: Striga, a genus of obligate parasitic weeds in the family Orobanchaceae, has been identified as the most important biological factor limiting agricultural productivity in sub-Saharan Africa. Germination of Striga seeds is triggered by strigolactone root exudates from host plants. Strigolactones also induce hyphal branching in arbuscular mycorrhizal (AM) fungi, which...
Resource Type:: Masters Thesis
Full Text:: Arbuscular Mycorrhizal Fungus Abstract approved: Jennifer L. Parke Striga

Role of a grass riparian zone in controlling the fate of nitrogen in a poorly drained agricultural landscape

Creator:: Davis, Jennifer H.
Abstract:: Riparian ecosystems, through their unique positions in the agricultural landscape, have the potential to mitigate nutrient loading to streams. This study was conducted to gain a better understanding of N cycling in a poorly drained Grass Riparian Zone (GRZ) and adjacent Perennial Ryegrass seed Field (PRF) in the Willamette Valley,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Jennifer H. Davis for the degree

Soil Development and Organic Carbon Stocks Across a Lithosequence in the Perhumid Coastal Temperate Rainforests of Southeast Alaska

Creator:: Fedenko, Jennifer M.
Abstract:: The perhumid coastal temperate rainforests of southeast Alaska contain an abundance of soil organic carbon (SOC) that has accumulated in a wet, cool climate where forest fire disturbance is minimal and organic matter decomposition rates are low. Coastal temperate rainforests are supported by carbon-rich soils that provide ecosystem services including...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Jennifer M. Fedenko

Determining the Minimum Treatment Area and Importance of Soil Irrigation for Solarizing Soil Infested with Phytophthora spp.

Creator:: Bennett, Logan L.
Abstract:: Nurseries are an important part of the agriculture industry of the United States. The nursery industry provides ornamental, forest, restoration and specialty products to many markets in N. America. The disease sudden oak death, caused by Phytophthora ramorum, has devastating environmental and economic impacts on forested land, the urban-forest interface,...
Resource Type:: Masters Thesis
Full Text:: : ____________________________________________________ Jennifer L. Parke Nurseries are an important part of the agriculture industry of the

Soil Solarization in Pacific Northwest Tree Seedling Nurseries: Effects on Soilborne Plant Pathogens, Soil Nutrients and the Soil Microbiome

Creator:: Weidman, Clara S.
Abstract:: Nursery and greenhouse products are economically important agricultural commodities for Oregon and Washington. Nursery crops including tree seedlings can be damaged or killed by soilborne plant pathogens, which can be challenging to manage because of their persistence in soil and limited options for control. Soil solarization is a pre-planting soil...
Resource Type:: Masters Thesis
Full Text:: :_____________________________________________________ Jennifer L. Parke Nursery and greenhouse products are economically important

Decomposition of Brassicaceae Residue in the Willamette Valley

Creator:: Berry, Pete A.
Abstract:: An important inoculum source of Leptosphaeria maculans and L. biglobosa (syn Plenodomus spp.), the pathogens that cause black leg in Brassicaceae crops, is infected plant residues. The general acceptance of conservation tillage in the Willamette Valley, Oregon, USA, has enabled a build-up in the amount of residue on or near...
Resource Type:: Dissertation
Full Text:: in this work. My committee members: Dr. Jennifer Parke, Dr. Cynthia Ocamb, Dr. Edward Peachey, and

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Creator:: Olarra, Jennifer A.
Abstract:: In arid and semi-arid deserts, soils are commonly covered with biological soil crusts. The study of arid biocrusts and their ecological function has become increasingly common in the literature over the last several decades. Interestingly, no mention is made of biological soil crusts in forested ecosystems, raising the question as...
Resource Type:: Masters Thesis
Full Text:: Jennifer A. Olarra for the degree of Master of Science in Soil Science presented on December 14, 2012

Microbial community structure as influenced by season and stand age in a Douglas-fir (Pseudotsuga menziesii) ecosystem

Creator:: Kucera, Jennifer Moore
Abstract:: Forest harvest can have significant impacts on forest ecosystems that may influence the capacity of soils to sequester carbon (C). The microbial community controls decomposition, which is a critical process in partitioning litter- and root-C between CO₂ and storage in semi-permanent soil-C pools. The objectives of this study were to...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jennifer Moore Kucera for

Retention of wheat alleles in imidazolinone-resistant wheat x jointed goatgrass recurrent backcross generations

Creator:: Kroiss, Lori Jennifer
Abstract:: The retention of D genome wheat alleles in the progeny of imidazolinoneresistant wheat (R-wheat) and jointed goatgrass hybrids backcrossed to jointed goatgrass was documented in this study. Resistance to the imazamox application was used as a marker for the imidazolinone-resistance gene. Fourteen simple sequence repeat (SSR) markers, for the wheat...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Lori Jennifer Kroiss for the

ScholarsArchive@OSU

Soil quality assessment of Willamette Valley soils and root colonization potential by arbuscular mycorrhizal fungi

Response of Striga-susceptible and Striga-resistant sorghum genotypes to soil phosphorus and colonization by an arbuscular mycorrhizal fungus

Role of a grass riparian zone in controlling the fate of nitrogen in a poorly drained agricultural landscape

Soil Development and Organic Carbon Stocks Across a Lithosequence in the Perhumid Coastal Temperate Rainforests of Southeast Alaska

Determining the Minimum Treatment Area and Importance of Soil Irrigation for Solarizing Soil Infested with Phytophthora spp.

Soil Solarization in Pacific Northwest Tree Seedling Nurseries: Effects on Soilborne Plant Pathogens, Soil Nutrients and the Soil Microbiome

Decomposition of Brassicaceae Residue in the Willamette Valley

Biological soil crusts in forested ecosystems of southern Oregon : presence, abundance and distribution across climate gradients

Microbial community structure as influenced by season and stand age in a Douglas-fir (Pseudotsuga menziesii) ecosystem

Retention of wheat alleles in imidazolinone-resistant wheat x jointed goatgrass recurrent backcross generations

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