Index Catalog // ScholarsArchive@OSU

Integration of conservation tilage and cover crops in broccoli production systems of the Pacific Northwest

Creator:: O'Brien, Timothy John
Abstract:: Field and greenhouse experiments were conducted in 1996 and 1997 to evaluate the effects of integrating conservation tillage and cover cropping on broccoli production as well as agroecological parameters. A field experiment was conducted during 1996-97 at the Oregon State University Horticulture Research farm near Corvallis, OR. The specific objectives...
Resource Type:: Masters Thesis
Full Text:: approved: ^., _ I John M. Luna Field and greenhouse experiments were conducted in 1996 and

Impact of cover crops on weed abundance and nitrogen contribution in broccoli, Brassica oleracea var. italica, production systems in the maritime Pacific Northwest

Creator:: Angustia, Segundo Nova
Resource Type:: Masters Thesis
Full Text:: . Production Systems in the Maritime Pacific Northwest. Abstract approved: —» 1/ ■ i /—*— John M. Luna

Improving nitrogen management with cover crops in organic broccoli production

Creator:: Garrett, Amy
Abstract:: Legume cover crops can serve as important sources of nitrogen (N) in sustainable agriculture and can be economically beneficial when fertilizer inputs are reduced without a yield reduction. Synchronizing N mineralization from organic materials with the needs of the subsequent crop is a challenge for organic growers. Predicting plant available...
Resource Type:: Masters Thesis
Full Text:: : _______________________________________________________________________ John M. Luna Legume cover crops can serve as important sources of nitrogen (N) in

Enhancement of biological control with beneficial insectary plantings

Creator:: Colley, Micaela Ruth
Abstract:: Five field experiments were conducted to evaluate the relative attractiveness of potential beneficial insectary plants to aphidophagous hover flies and parasitic Hymenoptera and the effectiveness of interplanting selected flowering plants in a broccoli field to enhance biocontrol of the cabbage aphid and green peach aphid. In 1996 we established a...
Resource Type:: Masters Thesis
Full Text:: Control with Beneficial Insectary Plantings. Abstract approved: rr r—i v—sj John M. Luna Five

Relationships of exotic species and wildfire to the threatened plant Silene spaldingii

Creator:: Menke, Carolyn A.
Abstract:: In the canyon grasslands of Garden Creek Ranch Preserve in Idaho, where the threatened plant Silene spaldingii occurs and invasion by the exotic species Centaurea solstitialis and Bromus tectorum is proceeding rapidly, I examined environmental and community patterns of site invasion, and evaluated the apparent influence of invasion on Silene...
Resource Type:: Masters Thesis
Full Text:: sincerely thank my committee members, Dave Pyke and John Luna for reviewing my manuscripts and offering

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Creator:: Ambrosino, Mario D.
Abstract:: Four key aspects of the relationship between predatory hoverflies and the aphid pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley, Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli...
Resource Type:: Dissertation
Full Text:: Dr. Paul Jepson and Dr. John Luna for their support and edits. The valuable comments of Dr. Steve

Statistical methods for serially correlated zero-inflated proportions

Creator:: Sun, Luna
Abstract:: Proportion data falling in the continuum (0, 1) are very common in practice. It can also happen that an inflated number of zeros (or ones) occur with proportion data. There are extensive studies of zero-inflated data in the literature. Almost all of them, however, focus on zero-inflated count data. Furthermore,...
Resource Type:: Dissertation
Full Text:: Proportions AN ABSTRACT OF THE DISSERTATION OF Luna Sun for the degree of Doctor of Philosophy in

Modeling surface water and groundwater interactions near Milton-Freewater, Oregon

Creator:: Petrides Jimenez, Aristides Crisostomos
Abstract:: The gravel aquifer of the Oregon side of Walla Walla River Basin has a strong hydrologic connection to surface water through a series of springs, unlined irrigation canals, the Walla Walla River, numerous wells and, since 2004, artificial recharge to the shallow aquifer using infiltration basins. The finite element Integrated...
Resource Type:: Masters Thesis
Full Text:: Cuenca and Dr. John Selker who reviewed and followed the development of this model very closely

Winterfat seed viability and dormant season livestock grazing

Creator:: Leary, Ryan
Abstract:: Krascheninnikovia lanata (winterfat) is a valuable forage species with an average of 10% crude protein during winter when there are few nutritious options for livestock and wildlife. However, excessive grazing throughout the west has negatively impacted survival of winterfat stands. We hypothesized that four years rest from dormant season livestock...
Resource Type:: Masters Thesis

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

Creator:: Groth, Eric M.
Abstract:: Pergamasus quisquiliarum Canestini is a polyphagous predatory mite that has been shown to feed on the economically important arthropod, Scutigerella immaculata Newport (Symphyla: Scutigerellidae), Collembola, Diptera larvae, Enchytraeid worms, and miscellaneous other soil organisms. This study examined the feeding behavior of P. quisquiliarum, the effects of cover cropping and tillage...
Resource Type:: Masters Thesis
Full Text:: my committee members, Drs. Ralph Berry, Jeffery Miller, and John Luna, and Alan Bakalinsky. I would

ScholarsArchive@OSU

Integration of conservation tilage and cover crops in broccoli production systems of the Pacific Northwest

Impact of cover crops on weed abundance and nitrogen contribution in broccoli, Brassica oleracea var. italica, production systems in the maritime Pacific Northwest

Improving nitrogen management with cover crops in organic broccoli production

Enhancement of biological control with beneficial insectary plantings

Relationships of exotic species and wildfire to the threatened plant Silene spaldingii

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Statistical methods for serially correlated zero-inflated proportions

Modeling surface water and groundwater interactions near Milton-Freewater, Oregon

Winterfat seed viability and dormant season livestock grazing

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

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