Index Catalog // ScholarsArchive@OSU

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Creator:: Nelson, Machelle A.
Abstract:: A better understanding of grass seed crop and soil fertility is necessary to improve fertilizer practices and preserving water quality in Willamette Valley, Oregon, where 55% of land-use is in grass seed production that directly impacts adjacent waterways containing native protected fish species. I determined tillage effects on soil N...
Resource Type:: Masters Thesis
Full Text:: : Stephen M. Griffith A better understanding of grass seed crop and soil fertility is necessary to improve

Students thought processes while engaged in computer programming

Creator:: Ahmed, Aqeel M.
Abstract:: The purpose of this qualitative study was to investigate the thought processes of secondary level novice programmers engaged in computer programming for the purpose of generating hypotheses for consideration in future research on the relationship between computer programming and problem solving. A high school BASIC programming course with 14 students...
Resource Type:: Dissertation
Full Text:: programming AN ABSTRACT OF THE THESIS OF Aqeel M. Ahmed for the degree of Doctor of Philosophy in Science

Production of haploid plants in selected winter wheat genotypes through anther culture and intergeneric crosses with maize

Creator:: Mendoza, Maria Graciela
Abstract:: A higher level of efficiency in the production of doubled-haploids must be achieved if this procedure is to be beneficial in plant improvement. Of equal importance is the development of protocols, which are not genotypic specific and result in progeny that represent a random sample of gametes from the parental...
Resource Type:: Dissertation
Full Text:: thesis to any reader upon request. M. etc a endoza Agurto. Author Redacted for privacy Redacted for

Biology of sweet cherry powdery mildew

Creator:: Calabro, Jill M.
Abstract:: The Pacific Northwest has become one of the nation’s premier sweet cherry, Prunus avium, production areas. As production of sweet cherries has flourished in Oregon and Washington, so has powdery mildew, caused by the fungus Podosphaera clandestina, which infects both foliage and fruit causing severe economic damage to growers. Sweet...
Resource Type:: Dissertation
Full Text:: THESIS OF Jill M. Calabro for the degree of Doctor of Philosophy in Botany and Plant Pathology

Multiple pest suppression with cover crops in strawberry

Creator:: Datta, Braja Bandhu
Abstract:: The experiment was conducted to compare multiple pest (weed, soil arthropod and diseases) suppression by cereal cover crops in 'Selva' and 'Totem' strawberry. In addition, perlite was used to compare improvement of soil and root aeration which might modify strawberry black root rot complex. Small-seeded summer annual weeds were suppressed...
Resource Type:: Masters Thesis
Full Text:: my committee members Dr. Kenneth B. Johnson, Dr. Edward W. Hellman and graduate representative Dr

The Primary Disease Gradient of Wheat Stripe Rust (Puccinia striiformis f. sp. tritici) Across Spatial Scales

Creator:: Farber, Daniel
Abstract:: Wheat stripe rust (WSR), also called yellow rust of wheat (Tricitum spp.), causal agent Puccinia striiformis f.sp. tritici (Pst), is a foliar disease of major economic importance on wheat, especially grown in temperate locations. WSR causes major losses of wheat yield, estimated at nearly $ 1 billion per year, and...
Resource Type:: Dissertation
Full Text:: sampled all wheat leaves within two intersecting 0.3 m × 3.0 m transects in eight replicates over three

Investigation of novel sources of genetic resistance to eastern filbert blight

Creator:: Lunde, China F.
Abstract:: To identify novel host genetic resistance to eastern filbert blight, caused by the fungus Anisogramma anomala (Peck) E. Muller, ninety European hazelnut {Corylus avellana L.) varieties and interspecific hybrids (with C. americana Marsh, or C. colurna L.) were screened for response to the eastern filbert blight pathogen after inoculation in...
Resource Type:: Masters Thesis
Full Text:: , Kenneth Johnson, and Patrick Hayes, also provided much helpful advice. The Horticulture Department as

Effects of refrigeration storage and processing technologies on the bioactive compounds and antioxidant capacities of blackberries ('Marion' and 'Evergreen')

Creator:: Wu, Ruyi
Abstract:: The objective of this project was to investigate the effects of refrigeration storage and processing technologies on the quality and nutraceutical benefit of blackberries. 'Marion' and 'Evergreen', the two major blackberry varieties in Oregon, were evaluated in this study. For refrigeration storage, fresh fruit were packed in clam-shell containers right...
Resource Type:: Masters Thesis
Full Text:: Kennedy, Andrew Ross and Kenneth Johnson for dedicating your precious times and efforts to review my

Breeding Snap Beans for Organic Agriculture: Quantification and Application of Key Traits

Creator:: Park, Hayley E.
Abstract:: Improving crop cultivars for use on organic farms is pertinent, as current elite germplasm is less resilient within the more variable context of organic farm environments. Although a growing number of studies have focused on organic plant breeding in cereal crops, very few have focused on vegetable crops, especially those...
Resource Type:: Masters Thesis

Overwintering survival of stem rust on perennial ryegrass : construction of a simulation model, and effects of the mycoparasite Sphaerellopisis filum

Creator:: Gordon, Tyler C.
Abstract:: Stem rust, caused by the fungus Puccinia graminis subsp. graminicola, can cause yield reductions exceeding 90% on perennial ryegrass (Lolium perenne L.) crops grown for seed if not treated with fungicide in the spring. There is evidence that late-spring stem rust epidemics are initiated by populations that survived the winter....
Resource Type:: Masters Thesis
Full Text:: throughout this research process. I would like to thank Drs. Christopher Mundt, Kenneth Johnson and David

ScholarsArchive@OSU

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Students thought processes while engaged in computer programming

Production of haploid plants in selected winter wheat genotypes through anther culture and intergeneric crosses with maize

Biology of sweet cherry powdery mildew

Multiple pest suppression with cover crops in strawberry

The Primary Disease Gradient of Wheat Stripe Rust (Puccinia striiformis f. sp. tritici) Across Spatial Scales

Investigation of novel sources of genetic resistance to eastern filbert blight

Effects of refrigeration storage and processing technologies on the bioactive compounds and antioxidant capacities of blackberries ('Marion' and 'Evergreen')

Breeding Snap Beans for Organic Agriculture: Quantification and Application of Key Traits

Overwintering survival of stem rust on perennial ryegrass : construction of a simulation model, and effects of the mycoparasite Sphaerellopisis filum

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