Index Catalog // ScholarsArchive@OSU

Effects of nitrogen source, rate and a nitrification inhibitor on soil nitrogen status and mineral composition of strawberry

Creator:: Marion, Carol I.
Abstract:: Three rates of urea, urea-DCD, and NH₄N0₃ were soil applied in April and August 1986 to strawberry selection OR-US 4930 and cultivar 'Sumas' to determine effects of the nitrification inhibitor dicyandiamide (DCD) and nitrogen source and rate on soil NH₄ and N0₃ levels, fruit yield and quality, and mineral composition...
Resource Type:: Masters Thesis
Full Text:: . Marion ACKNOWLEDGEMENTS I would like to thank my committee members, Drs. Lloyd Martin, Tim

Ammonium in grapevines : seasonal levels in tissue and xylem extracts, and a tendril model system

Creator:: Jordan, David T.
Resource Type:: Dissertation
Full Text:: remaining members of my committee: Tim Righetti, Neil Christensen and Ron Wrolstad. Their time and

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Creator:: Thomasson, James E.
Abstract:: The effects of five tillage treatments on soil bulk density and mechanical impedance were examined on Newburg sandy loam soil in the Willamette Valley, Oregon, in 1987. Subsequent effects on seedling emergence and yield of carrots (Daucus carota L., cvs. Orlando Gold and Royal Chantenay) were also measured. Mechanical impedance...
Resource Type:: Masters Thesis
Full Text:: also to my other committee members: Tim Righetti, Jim Vomocil and Larry Burrill. Special thanks go to

Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs

Creator:: Shroll, Erin
Abstract:: An alternative to traditional roofing, extensive green roofs are contained ecosystems consisting of a drainage layer, a thin media profile which is planted with hardy plant species. Extensive green roof plants must maintain multiple functions while growing in a highly aggregate media at a depth of equal to or less...
Resource Type:: Masters Thesis
Full Text:: : Steve Kunert for writing assistance and committee members, Pat Muir, Lori Cramer and Tim Righetti

Factors influencing growth of young Douglas-fir and red alder in the Oregon Coast Range : interference, nitrogen availability, and animal damage

Creator:: Fuentes-Rodríquez, Laura Angélica
Abstract:: Red alder (Alnus rubra Bong.) is a common associate and a potentially severe competitor of Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco) in the Oregon Coast Range. However, because it fixes nitrogen and increases rates of soil nutrient cycling, red alder has the potential to benefit Douglas-fir. The objective of...
Resource Type:: Masters Thesis

Epidemiology of disease caused by Pseudomonas syringae as an epiphyte and its frequency, distribution, and characteristics as an endophyte of pear

Creator:: Whitesides, Steven K.
Abstract:: Conditions were established for inducing pear blossom blast caused by Pseudomonas syringae (Ps) on both attached and detached shoots. The incidence of disease was proportional to the log of Ps population under optimal temperature, moisture and bloom developmental stage. Highest incidence of infection followed occurrence of a major exotherm in...
Resource Type:: Dissertation
Full Text:: : Drs. Ron Cameron, Larry Moore, Tim Righetti, and John Hart. Ron and Larry were very helpful providing

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:: : Dr. Dale Moss, Dr. Tim Righetti, Dr. Tom Grigsby, and Dr. Barry Schrumpf, all of whom have had a

Transformation of tobacco with the yeast FRE1 and FRE2 genes : characterization of transformants and discovery of a temperature-dependent morphological mutant

Creator:: Samuelsen, Andrew Ira
Abstract:: A key mechanism utilized by plants to make iron (Fe) available for uptake is the reduction of Fe(III) to Fe(II) via an inducible, plasma membrane-bound Fe(III) reductase. Genes encoding such enzymes have not yet been isolated from plants; however, two Fe(III) reductases have been cloned from yeast. FRE1 and FRE2...
Resource Type:: Dissertation
Full Text:: microscope photography. Thanks to my other committee members Drs. Tim Righetti, Joyce Loper and Debra Rose

Microbiology of soil aggregates recovered from different crop management systems

Creator:: Mendes, Iêda de Carvalho
Resource Type:: Dissertation
Full Text:: . Tim Righetti for serving on my committee. Special thanks go to Dr. Richard Dick for allowing me to

Differential storage temperature and duration effects on ethylene synthesis and firmness of 'Anjou' pears

Creator:: Gerasopoulos, Dimitrios
Abstract:: 'Anjou' pears were sprayed with 2 concentrations of CaCl₂ during fruit development and harvested at 70 N flesh firmness. Pears were held at -1.1°, 5°, 10°, or 20°C for up to 100 days then ripened at 20°C for 11 days. Unexpectently, fruits stored at 20°C lost firmness and chlorophyll after...
Resource Type:: Dissertation
Full Text:: members, Dr. Ron Wrolstad, Dr. Tim Righetti, Dr. Anita Miller, Dr. Al Mosley and former committee

ScholarsArchive@OSU

Effects of nitrogen source, rate and a nitrification inhibitor on soil nitrogen status and mineral composition of strawberry

Ammonium in grapevines : seasonal levels in tissue and xylem extracts, and a tendril model system

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Plant selection, irrigation requirements and stormwater management of Pacific Northwest extensive green roofs

Factors influencing growth of young Douglas-fir and red alder in the Oregon Coast Range : interference, nitrogen availability, and animal damage

Epidemiology of disease caused by Pseudomonas syringae as an epiphyte and its frequency, distribution, and characteristics as an endophyte of pear

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

Transformation of tobacco with the yeast FRE1 and FRE2 genes : characterization of transformants and discovery of a temperature-dependent morphological mutant

Microbiology of soil aggregates recovered from different crop management systems

Differential storage temperature and duration effects on ethylene synthesis and firmness of 'Anjou' pears

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