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An analysis of the population dynamics of selected avian species

Creator:: Henny, Charles J.
Abstract:: The impact that pesticides may have had on the mortality rates and productivity rates of non-game birds during the last 25 years was evaluated by studying the population dynamics of 16 species. A mathematical model showing the relationships between population parameters that yielded stable populations was developed. The information needed...
Resource Type:: Dissertation
Full Text:: pelican, barn owl, chimney swift, blue jay, black-capped chickadee, Howard . Wight Redacted for Privacy

The developmental cytopathology of Prunus persica Batsch. and P. avium L. infected with X-disease and Albino disease respectively

Creator:: Florance, E. R.
Abstract:: In 1967, Doi et al. proposed the hypothesis that 'yellows type diseases' are caused by mycoplasma. Since then more than 60 yellows diseases have been associated with mycoplasma-like bodies (MLB) (Maramorosch, 1973). The majority of these associations are based upon electron microscopic observations of mycoplasma-like bodies in situ. However, little...
Resource Type:: Dissertation
Full Text:: . and P. avium L infected with x-disease and albino disease respectively AN ABSTRACT OF THE THESIS OF

Modeling climate, vegetation, and water balance at landscape to regional scales

Creator:: Daly, Christopher
Abstract:: The general objective of this study was to develop models and datasets that would significantly advance our ability to assess the current and future effects of global change on the biosphere. The focus was in two areas: (1) preparing environmental datasets at regional to small watershed scales; and (2) developing...
Resource Type:: Dissertation

The response of tomatoes to atrazine as affected by magnesium and photoperiod

Creator:: Brenchley, Ronald Glenn
Abstract:: Studies were conducted to determine the nature of the interaction between atrazine (2-chloro-4-ethylamino-6-isopropylaminos- triazine) and magnesium on tomatoes. This interaction was studied under two light regimes: continuous light and a 12-hour photoperiod. Tomato plants were grown in sand cultures at three levels of magnesium fertilization. Four weeks after planting, atrazine...
Resource Type:: Dissertation
Full Text:: magnesium and photoperiod AN ABSTRACT OF THE THESIS OF RONALD GLENN BRENCHLEY for the PH. D. (Name) in

The effect of osmotic moisture stress during germination on Douglas-fir (Pseudotsuga menziesii)

Creator:: Stewart, Ronald E
Abstract:: Commercially collected Douglas-fir seed from a moist coastal ecotype (LaPush, Washington) and a dry inland ecotype (Kaibab National Forest, Arizona) were subjected to osmotic stresses ranging from 0 to -8 atmospheres using Carbowax polyethylene glycol 6000 during imbibition and germination. To determine the effect of osmotic stress on the initiation...
Resource Type:: Dissertation

Evaluation of water damage on asphalt concrete mixtures using the environmental conditioning system

Creator:: Al-Joaib, Ali Abdulla
Abstract:: Asphalt concrete pavement is subjected to several damaging actions from traffic loads, water (from precipitation and/or groundwater sources), and temperature. The durability of the asphalt-aggregate mixture, its ability to withstand these damaging actions for long periods, is a very important engineering property. While the durability of the asphalt-aggregates mixture depends...
Resource Type:: Dissertation
Full Text:: : Dr. Ronald L. Terrel Asphalt concrete pavement is subjected to several damaging actions from traffic

Effects of method and timing of pollination and temperature on fruit development in red raspberry

Creator:: Bekey, Ronald S.
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Ronald S. Bekey for the degree of

Interactive visualization of diversity in multivariate data sets unified across fields of study

Creator:: Pham, Tuan N. T.
Abstract:: The study of the diversity of multivariate objects shares common characteristics across disciplines, including ecology and organizational management. Nevertheless, experts in these two disciplines have adopted somewhat separate diversity concepts and analysis techniques, limiting the ability of potentially sharing and cross comparing these concerns. Moreover, while complex diversity data may...
Resource Type:: Dissertation
Full Text:: Visualization of Diversity in Multivariate Data Sets Unified across Fields of Study Abstract approved: Ronald

Interaction between glyphosate and certain s-triazine herbicides

Creator:: Somabhi, Montien
Abstract:: Investigations were made in the field, greenhouse, growth chamber, and laboratory to: (a) observe the general activity of N- (phosphonomethyl)glycine (glyphosate); (b) determine the extent of its interaction with certain s-triazine herbicides; and (c) find an explanation for such an interaction. Greenhouse and growth chamber studies substantiated other observations that...
Resource Type:: Dissertation
Full Text:: the following individuals: To Dr. Arnold P. Appleby for his helpful counseling and con- stant

Water and solute transport : modeling and application to water conservation in layered soil

Creator:: Mohammed, Fareed H. A. N.
Abstract:: Sandy soils are among the least productive soils because of their inability to store adequate water for plant growth. Their high percolation rate not only allows water to move quickly beyond the root zone, but also washes nutrients below the reach of plant roots. High evaporation occurs from the soil...
Resource Type:: Dissertation
Full Text:: Abstract approved: Benno P. Warkentin Sandy soils are among the least productive soils because of their

ScholarsArchive@OSU

An analysis of the population dynamics of selected avian species

The developmental cytopathology of Prunus persica Batsch. and P. avium L. infected with X-disease and Albino disease respectively

Modeling climate, vegetation, and water balance at landscape to regional scales

The response of tomatoes to atrazine as affected by magnesium and photoperiod

The effect of osmotic moisture stress during germination on Douglas-fir (Pseudotsuga menziesii)

Evaluation of water damage on asphalt concrete mixtures using the environmental conditioning system

Effects of method and timing of pollination and temperature on fruit development in red raspberry

Interactive visualization of diversity in multivariate data sets unified across fields of study

Interaction between glyphosate and certain s-triazine herbicides

Water and solute transport : modeling and application to water conservation in layered soil

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