Index Catalog // ScholarsArchive@OSU

Microbial community dynamics associated with rhizosphere carbon flow

Creator:: Butler, Jessica L.
Abstract:: The cycling of root-deposited photo synthate (rhizodeposition) through the soil microbial biomass is widely recognized as a critical component of ecosystem functioning. Little is currently known about the flow of photosynthate through the microbial biomass however. My research goal was to examine if and how the flow of root-deposited photo...
Resource Type:: Masters Thesis
Full Text:: ASSOCIATED WITH RHIZOSPHERE CARBON FLOW by Jessica L. Butler A THESIS submitted to Oregon State

Gene flow from transgenic glyphosate-resistant creeping bentgrass (Agrostis stolonifera L.) at the landscape level

Creator:: Zapiola, Maria Luz
Abstract:: Creeping bentgrass (Agrostis stolonifera L.) is an outcrossing, small- seeded, perennial grass that can establish outside of cultivation and has several compatible relatives. Glyphosate is a nonselective, broad spectrum, herbicide. Transgenic glyphosate-resistant (GR) creeping bentgrass (GRCB) was developed by The Scotts Company and Monsanto, but is still under USDA-APHIS regulated...
Resource Type:: Dissertation
Full Text:: involved in the improvement of the manuscript. Mr. Marvin Butler was a valuable support during the in

Small broomrape (Orobanche minor) management using wheat (Triticum aestivum) as a false host

Creator:: Al-thahabi, Salam A.
Abstract:: Small broomrape (Orobanche minor) is an obligate, chlorophyll-lacking parasite that parasitizes red clover (Trifolium pratense) roots. This study was conducted to develop and implement an integrated, biologically based control program for small broomrape by using wheat as a false host to reduce the soil seed bank. The relationship between temperature...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Salam A. Al-thahabi for the degree of Doctor of Philosophy in Crop Science presented on

Vernalization requirements and seed dormancy of jointed goatgrass (Aegilops cylindrica)

Creator:: Fandrich, Lynn
Abstract:: Jointed goatgrass (Aegilops cylindrica Host) infestations in winter wheat (Triticum aestivum L.) production regions of the central and western USA result in severe economic losses in the wheat market. Field and greenhouse studies were conducted to determine the vernalization requirements of winter wheat, spring wheat, jointed goatgrass, and wheat by...
Resource Type:: Dissertation
Full Text:: . Detailed observations in the greenhouse revealed a longer period between jointing and anthesis for most

Growth and reproduction of annual bluegrass (Poa annua) in response to trinexepacethyl or prohexadione-calcium at multiple rates and application timings

Creator:: Faletti, Matthew T.
Abstract:: Field experiments were conducted in 2002 and 2003 in the Willamette Valley of Oregon to investigate the effects of two plant growth regulators on the growth and reproduction of the weed annual bluegrass. Previous research suggested that the plant growth regulator prohexadione-calcium hastened senescence of annual bluegrass. Another plant growth...
Resource Type:: Masters Thesis
Full Text:: and Application Timings. Abstract approved: Carol A. Mallory-Smith Jed B. Colquhoun Abstract

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:: MAPPING TECHNIQUES FOR SOIL SURVEY AND SALINITY MAPPING ABDELHAMID A. ELNAGGAR

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Creator:: Boyle, Stephanie A.
Abstract:: The objectives of this thesis were to examine the links between soil microbial community composition and function using the nitrogen (N) cycle as a model for these interactions and to assess the impact of environmental factors such as microclimate, vegetation type, and nutrient availability on microbial diversity and N transformations...
Resource Type:: Dissertation
Full Text:: Stephanie A. Boyle for the degree of Doctor of Philosophy in Soil Science presented on March 15, 2007

Jointed goatgrass (Aegilops cylindrica Host) genetic diversity and hybridization with wheat (Triticum aestivum L.)

Creator:: Gandhi, Harish Tulshiramji
Abstract:: Jointed goatgrass (Aegilops cylindrica Host; 2n=4x=28; CCDD) is an agriculturally important species both as a weed and as a genetic resource for wheat (Triticum aestivum L.; 2n=6x=42; AABBDD) improvement. In order to better understand the evolution of this species, the diversity of Ae. cylindrica was evaluated along with its progenitors,...
Resource Type:: Dissertation
Full Text:: .) Abstract approv car Riera-Lizarazu Carol A. MaIlory-Sm7' Jointed goatgrass (Aegilops cylindrica Host; 2n

Reducing over-winter nitrogen loss

Creator:: Hart, John M., Horneck, Donald A., Sullivan, Dan M., and Christensen, Neil W.
Abstract:: Nitrogen can be lost when the quantity of available nitrogen exceeds crop demand or nitrogen availability is not in synchrony with crop demand. Either situation results in accumulation of available nitrogen, primarily in the nitrate form, at the end of the growing season. Over-winter nitrogen loss occurs primarily as nitrate-...
Resource Type:: Conference Proceeding
Full Text:: . The list of crops grown in the western United States is many times this number and a data for a crop

Carbon cycling and priming of soil organic matter decomposition in a forest soil following glucose additions

Creator:: Diaz, David D.
Abstract:: Soils are a globally significant carbon (C) pool and have the potential to respond to elevated CO2 and environmental changes through positive feedback cycles that enhance the turnover of soil organic matter (SOM). Understanding the mechanisms governing the turnover of SOM is particularly important for modeling the fate of C...
Resource Type:: Masters Thesis
Full Text:: May 1, 2008. Title: Carbon Cycling and Priming of Soil Organic Matter Decomposition in a Forest

ScholarsArchive@OSU

Microbial community dynamics associated with rhizosphere carbon flow

Gene flow from transgenic glyphosate-resistant creeping bentgrass (Agrostis stolonifera L.) at the landscape level

Small broomrape (Orobanche minor) management using wheat (Triticum aestivum) as a false host

Vernalization requirements and seed dormancy of jointed goatgrass (Aegilops cylindrica)

Growth and reproduction of annual bluegrass (Poa annua) in response to trinexepacethyl or prohexadione-calcium at multiple rates and application timings

Development of predictive mapping techniques for soil survey and salinity mapping

The link between nitrogen cycling and soil microbial community composition in forest soils of western Oregon

Jointed goatgrass (Aegilops cylindrica Host) genetic diversity and hybridization with wheat (Triticum aestivum L.)

Reducing over-winter nitrogen loss

Carbon cycling and priming of soil organic matter decomposition in a forest soil following glucose additions

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