Index Catalog // ScholarsArchive@OSU

Linking soluble C to microbial community composition and dynamics during decomposition of ¹³C-labeled ryegrass

Creator:: McMahon, Shawna K.
Abstract:: Ryegrass residue consists of three main C fractions: readily available soluble C, intermediately available cellulose and hemicellulose, and slowly available lignin. Changes in chemical composition during decomposition influence rate of degradation as well as composition of the microbial community involved. Use of ¹³C-labeled plant material coupled with analysis of phospholipid...
Resource Type:: Masters Thesis
Full Text:: '3C of respired CO2-C measured at each respiration 50 sampling for (A) 0-18 d and (B) 0-80 d 2.3

The effects of paclobutrazol and uniconazol on red clover seed production

Creator:: Silberstein, Thomas B.
Abstract:: Excessive growth by red clover, Trifolium pratense L., grown for seed interferes with maximum seed production and harvest in Oregon's Willamette Valley. This study was conducted during 1986 and 1987 on red clover cv. Kenland to determine if plant height and dry matter production could be inhibited and seed yields...
Resource Type:: Masters Thesis
Full Text:: Privacy Dean of Graduate .c)ool Date thesis is presented June 10. 1994 Typed by Thomas B. Silberstein

Integrated small broomrape (Orobanche minor Sm.) management in red clover (Trifolium pratense L.)

Creator:: Ross, Kyle C.
Abstract:: Small broomrape, a holoparasitic weed, is a relatively new weed introduction in the Pacific Northwest that has contaminated a limited number of red clover fields in Oregon. Greenhouse and field studies were conducted to evaluate small broomrape response to common crop and weed species in the Pacific Northwest. Host species...
Resource Type:: Masters Thesis
Full Text:: .) management in red clover (Trifolium pratense L.) AN ABSTRACT OF THE THESIS OF Kyle C. Ross for the degree

The effect of preplant nitrogen fertilization and soil temperature on biological nitrogen fixation and yield of alfalfa (Medicago sativa L.)

Creator:: Shuler, Philip E.
Abstract:: The usefulness of preplant nitrogen (N) in establishing alfalfa in colder production areas has not been well characterized. This study was conducted to determine the effect of preplant N and soil temperature on yield, percent N derived from biological nitrogen fixation (PBNF), and shoot N concentration in alfalfa (Medicago sativa...
Resource Type:: Dissertation
Full Text:: , 40, 80 kg ha-1) and three day/ - night soil temperatures (18/12°C, 24/16°C, 27/21°C) on yield, PBNF

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Creator:: Lloyd, Deanna M.
Abstract:: In the midst of double-digit growth in market demand for organic products, there is a lag in the growth of certified organic production in the United States. This thesis investigated the motivations and barriers farmers face when making the transition to organic agriculture. Three distinct organic farmer typologies were identified:...
Resource Type:: Masters Thesis
Full Text:: ..........................................................................65 Finding the Farm’s Future: Matt Battilega of Big B Farm ............68 Reflections on

Improving Best Management Practices for Potato Production in the Columbia Basin : An Evaluation of Essential Oils for Control of Verticillium Wilt and the Fate of Chloride in the System

Creator:: Light, Sarah Elizabeth
Abstract:: Although the potato (Solanum tuberosum L.) is a global crop, few growing regions rival the high yields of the Columbia Basin of Eastern Oregon and Washington. Two research projects were conducted in Hermiston, OR to contribute to best management practices for the region. The first project evaluated the efficacy of...
Resource Type:: Masters Thesis
Full Text:: , starch, proteins, fiber, potassium, phosphorous, magnesium, vitamin C, and several forms of vitamin B

Simple sequence repeat marker development and fingerprinting in Cuphea lanceolata Ait. and C. viscosissima Jacq

Creator:: Karmarkar, Vidyadhar M.
Abstract:: Microsatellites or simple sequence repeats (SSRs) are highthroughput sequence based DNA markers that have been exploited as tools for measuring genetic distance and diversity in evolutionary studies, protection of intellectual property, genetic resource conservation management, cultivar identification and molecular breeding of crop plants. We isolated and sequenced 1095 clones from...
Resource Type:: Masters Thesis
Full Text:: reduced (Crane et al. 1995a,b; Knapp and Crane 2000a,b,c). Near- isogenic lines and other novel breeding

Comparative Genomics of Different Races of Columbia Root-knot Nematode and Development of Molecular Markers Linked to Corky Ringspot Resistance in Potato

Creator:: Hu, Shengwei
Abstract:: On a global scale, potato (Solanum tuberosum L.) plays an important role in tackling the threat of food insecurity due to its high yield and broad global acceptance. However, pathogens threaten potato production, causing direct yield loss and rendering potatoes tubers unmarketable. Breeding new cultivars that carry multiple resistances is...
Resource Type:: Masters Thesis
Full Text:: vitamin C vegetables (Drewnowski and Rehm 2013). Potato is also a source of important B vitamins

Breeding qualitative and quantitative traits for potatoes in the Columbia Basin

Creator:: Graebner, Ryan C.
Abstract:: The cultivated potato (Solanum tuberosum L.) is one of the world’s most important staple crops, ranked fourth after maize, rice, and wheat. While the potato’s success is due largely to its high yield, it also benefits from its broad global acceptance, and its ability to be used by the consumer...
Resource Type:: Dissertation
Full Text:: important staple crops, the potato is high in many vitamins and minerals, including vitamin B-6, vitamin C

Quantifying C and N contents and isotope signatures of SOM pools in the H. J. Andrews DIRT plots

Creator:: Keirstead, Heath
Abstract:: The mechanisms governing short- and long-term belowground carbon dynamics need to be understood. As part of a larger project developed to assess the effect of quantity and quality of litter inputs on the rate of soil organic matter (SOM) formation, I examined SOM in the H. J. Andrews Detritus Input...
Resource Type:: Masters Thesis
Full Text:: ..............................................39 5a-e. (a) Carbon concentration, (b) nitrogen concentration, (c) C:N ratio, (d) S'3C isotope ratio

ScholarsArchive@OSU

Linking soluble C to microbial community composition and dynamics during decomposition of ¹³C-labeled ryegrass

The effects of paclobutrazol and uniconazol on red clover seed production

Integrated small broomrape (Orobanche minor Sm.) management in red clover (Trifolium pratense L.)

The effect of preplant nitrogen fertilization and soil temperature on biological nitrogen fixation and yield of alfalfa (Medicago sativa L.)

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Improving Best Management Practices for Potato Production in the Columbia Basin : An Evaluation of Essential Oils for Control of Verticillium Wilt and the Fate of Chloride in the System

Simple sequence repeat marker development and fingerprinting in Cuphea lanceolata Ait. and C. viscosissima Jacq

Comparative Genomics of Different Races of Columbia Root-knot Nematode and Development of Molecular Markers Linked to Corky Ringspot Resistance in Potato

Breeding qualitative and quantitative traits for potatoes in the Columbia Basin

Quantifying C and N contents and isotope signatures of SOM pools in the H. J. Andrews DIRT plots

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