Index Catalog // ScholarsArchive@OSU

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

Creator:: Turner, Robert Bruce
Abstract:: Studies were conducted from 1962 to 1966 to investigate the effectiveness of several practices in manipulating medusahead (Taeniatherum asperum (Sim. ) Nevski) infested and/or dominated ecosystems by releasing competition in favor of perennial grasses. Several herbicide treatments were evaluated for selective control of medusahead and cheatgrass (Bromus tectorum L. )...
Resource Type:: Dissertation
Full Text:: THESIS OF ROBERT BRUCE TURNER for the DOCTOR OF PHILOSOPHY (Name) (Degree) in RANGE MANAGEMENT

Vegetation and animal responses to grazing crested wheatgrass at three intensities and two seasons in southern Idaho

Creator:: Sharp, Lee Ajax
Abstract:: Land useable for livestock grazing in the western United States is diminishing because of spreading municipalities, irrigation developments, highway construction, recreational demands and withdrawals. Concurrently, the demand for livestock and livestock products is increasing because of a rapidly growing population. As a result, production from the grazing land that remains...
Resource Type:: Dissertation
Full Text:: represent plant condition, range condition and soil condition better than percentage of herbage removed

The role of morphologic feedback in surf zone sand bar response

Creator:: Plant, Nathaniel Granger
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Nathaniel Granger Plant for the

Forest associations and secondary plant succession in the southern Oregon coastal range

Creator:: Bailey, Arthur Wesley, 1938-
Abstract:: Forest associations, secondary succession, and relationships of plant communities to Roosevelt elk were investigated. Stratification of vegetation into ecological units and an understanding of secondary succession by habitat-type were a necessary first step in investigations into browsing of conifers by elk. The study was jointly conducted by the Oregon State...
Resource Type:: Dissertation
Full Text:: SECONDARY PLANT SUCCESSION IN THE SOUTHERN OREGON COAST RANGE Abstract approved s Forest

Influence of range improvement practices on composition, production, and utilization of Artemisia deer winter range in central Oregon

Creator:: Urness, Philip J.
Abstract:: Recent emphasis on range improvement of sagebrush-bunch-grass types in Oregon has underscored the need for better understanding of their importance to deer winter range management. The objectives of this study were to evaluate the impact of various sagebrush control practices on the composition, production, and utilization of deer forage plants...
Resource Type:: Dissertation
Full Text:: URNESS for the Ph. D. in Range Management (Name) (Degree) (Major) Date thesis is presented Title

Numerical classification of range vegetation and statistical analysis of its ecology

Creator:: Pyott, William Tucker, 1936-
Abstract:: The purpose of the research was to computerize mathematical procedures for the analysis of range vegetation and environmental data. The specific objectives were as follows: 1. to develop and apply computer techniques to the classification of vegetation in order to provide a phytosociological framework within which to investigate the ecology...
Resource Type:: Dissertation
Full Text:: value of range plant species and species groups, in deciding questions of land use, in planning for

Seasonal cattle and sheep diets on Festuca arundinacea-Trifolium subterraneum and Lolium perenne-Trifolium subterraneum pastures in western Oregon

Creator:: Bedell, Thomas E.
Abstract:: Sheep and cattle dietary preferences were determined on tall fescue-subclover ( Festuca arundinacea-Trifolium subterraneum) and perennial ryegrass-subclover (Lolium perenne-Trifoliuni subterraneum) pastures in western Oregon during the spring and summer periods of 1964 and 1965. Esophageal-fistulated Willamette ewes and Hereford and Hereford-Angus yearling cattle were grazed separately on each pasture mixture...
Resource Type:: Dissertation
Full Text:: ecology of the total plant community. Effects of grazing on range and pasture vegetation have been

Plant succession on two Artemisia habitat types in southeastern Oregon

Creator:: Tueller, Paul T., 1934-
Resource Type:: Dissertation
Full Text:: Climate 15 Vegetation 18 REVIEW OF LITERATURE 23 Plant Succession 23 Range Condition and Trend 25

Modeling and testing of semi-insulating gallium arsenide interdigitated photodetectors

Creator:: Kollipara, Ravindranath Tagore
Abstract:: High speed photodetectors are a necessary element in broad band digital and analog optical communication systems. In this thesis easily integrable planar high speed photodetectors made on undoped semi-insulating (SI) GaAs substrates are modeled and tested. The fabrication process of the detectors is fully compatible with GaAs metal-semiconductor field effect...
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy Thomas K. Plant High speed photodetectors are a necessary element in broad band

Electrical properties of GaAs FET structures

Creator:: Yang, Fanling Hsu
Abstract:: The electrical properties of ion-implanted GaAs FET channels are investigated by two methods. First, the channel current (I) as a function of voltage (V) is examined at different temperatures and using different voltage ramp rates. The standard FET I-V curve, which can be observed on a commercial curve tracer, is...
Resource Type:: Dissertation
Full Text:: approved: Redacted for privacy T. K. Plant The electrical properties of ion-implanted GaAs FET channels

ScholarsArchive@OSU

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

Vegetation and animal responses to grazing crested wheatgrass at three intensities and two seasons in southern Idaho

The role of morphologic feedback in surf zone sand bar response

Forest associations and secondary plant succession in the southern Oregon coastal range

Influence of range improvement practices on composition, production, and utilization of Artemisia deer winter range in central Oregon

Numerical classification of range vegetation and statistical analysis of its ecology

Seasonal cattle and sheep diets on Festuca arundinacea-Trifolium subterraneum and Lolium perenne-Trifolium subterraneum pastures in western Oregon

Plant succession on two Artemisia habitat types in southeastern Oregon

Modeling and testing of semi-insulating gallium arsenide interdigitated photodetectors

Electrical properties of GaAs FET structures

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