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Phosphorus uptake by winter wheat cultivars as related to root characteristics

Creator:: Kaneshi, Katsuya
Abstract:: Experiments were conducted to compare differences in P uptake characteristics between two winter wheat cultivars Stephens and Yamhill (Triticum aestivum L) as related to root morphologies. Root length, root surface area and mean root radius were compared. Plant roots and shoots were separately analyzed for P content. The cultivars were...
Resource Type:: Masters Thesis
Full Text:: . Drs. Roger G. Peterson and Richard Dick, members of graduate committee, for advice and encouragement

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

Creator:: Henneberger, Diane
Abstract:: Hand-defoliation was evaluated for its ability to simulate herbivory by cinnabar moth larvae, Tyria jacobaeae (L.) (Arctiidae) on the weed tansy ragwort, Senecio jacobaea L. (Asteraceae). The evaluation was done on a field population of flowering ragwort, for three different timings (early, middle, and late season) of damage. In the...
Resource Type:: Masters Thesis
Full Text:: . Anderson and Roger G. Peterson for their helpful suggestions. Randy Chakerian was a continuing source of

The influence of selected environmental factors on diuron toxicity to winter wheat

Creator:: Homesley, Wylie Buress
Abstract:: Previous work has shown that diuron (3-(3, 4- dichlorophenyl)-1, 1-dimethylurea) is less toxic to fall-planted wheat than to wheat planted in the spring. Diuron has been a significant factor in increasing yields of winter wheat grown in Oregon's Willamette Valley. The influence of several selected environmental factors on diuron toxicity...
Resource Type:: Dissertation
Full Text:: . Appleby, Donald. W. Hedrick and Roger G. Peterson, I express thanks for personal interest in correcting

Interrelation of the components of grain yield in a cross between dwarf and semidwarf wheat (Triticum aestivum L.) cultivars

Creator:: Medina, Luis E.
Abstract:: Parents and progeny populations from a cross of 'Stephens'x 'Tibet dwarf' were grown in a spaced-planted experiment to obtain information concerning the nature of inheritance and possible associations between grain yield and the components of yield. Agronomic traits measured on an individual plant basis were: heading date, days to maturity,...
Resource Type:: Masters Thesis
Full Text:: Ann Corey for her friendship, and encouragement. Special thanks to Dr. Patrick Hayes, Dr. Roger G

A preliminary investigation into the use of the tarif system and three tree selection methods for obtaining Douglas-fir stand and stock tables from large-scale aerial photography

Creator:: McCadden, Richard Jay
Abstract:: As a preliminary step toward the establishment of a 70 mm. aerial photo timber inventory system capable of generating accurate stand tables, stock tables, and gross volume estimates, this project focuses on the development of a system which (1) eliminates the need to measure tree height on the photos through...
Resource Type:: Masters Thesis

An economic analysis of cattle feeding and interregional flows of live and carcass beef

Creator:: Bhagia, Gobind Shewakram
Resource Type:: Dissertation
Full Text:: appreciative of Drs. William G. Brown, Richard S. Johnston, Roger Peterson, and Lafayette Harter

Population dynamics, annual food consumption, movements, and dive behaviors of harbor seals, Phoca vitulina richardis, in Oregon

Creator:: Harvey, James T. (James Thomas)
Abstract:: Number of harbor seals, counted on 32 haul-out areas in Oregon, increased by 6 - 8.8 % per year from 1975 - 1983. Percent of seals in bays has increased an average 1.8%/year, from 47% in 1975 to 61% in 1983. Along the central Oregon coast, harbor seals were most...
Resource Type:: Dissertation

Analysis of Oregon's wholesale demand for California table wines

Creator:: Berkeley, Errol Winston
Abstract:: The passing of the 21st Amendment to the United States Constitution has given to individual states the authority to regulate the sale, distribution and taxation of domestically produced wines, and made the wine trade potentially significant as a means of augmenting state revenues. In the state of Oregon, table wines...
Resource Type:: Masters Thesis
Full Text:: invaluable assistance in this venture. I would also like to thank Dr. John A. Edwards and Dr. Roger

Substitutional relationships between rainbow trout and pansize salmon : a market demand analysis

Creator:: Queirolo, Lewis E.
Abstract:: The fundamental objective of this analysis was to isolate and identify the factors governing the demand for domestically produced rainbow trout in a representative west coast market, and assess the impact on that demand, if any, of the introduction of pansize salmon. The approach taken in this market demand study...
Resource Type:: Masters Thesis
Full Text:: inside. I wish also to express my appreciation to Dr. Roger G. Peter sen for serving on my

High resolution paleoclimatology from the varved sediments of the Gulf of California

Creator:: Baumgartner, Timothy Robert
Resource Type:: Dissertation
Full Text:: into a coherent dissertation. I thank Vern Kuim, Bill Quinn, Roger Peterson, and Jeffrey Barnes as my

ScholarsArchive@OSU

Phosphorus uptake by winter wheat cultivars as related to root characteristics

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

The influence of selected environmental factors on diuron toxicity to winter wheat

Interrelation of the components of grain yield in a cross between dwarf and semidwarf wheat (Triticum aestivum L.) cultivars

A preliminary investigation into the use of the tarif system and three tree selection methods for obtaining Douglas-fir stand and stock tables from large-scale aerial photography

An economic analysis of cattle feeding and interregional flows of live and carcass beef

Population dynamics, annual food consumption, movements, and dive behaviors of harbor seals, Phoca vitulina richardis, in Oregon

Analysis of Oregon's wholesale demand for California table wines

Substitutional relationships between rainbow trout and pansize salmon : a market demand analysis

High resolution paleoclimatology from the varved sediments of the Gulf of California

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