Index Catalog // ScholarsArchive@OSU

Physiological and agronomic response of potato periderm russeting to measures for control of common scab

Creator:: Callihan, R. H. (Robert Harold), 1933-
Abstract:: Management factors used for studies on potato scab control were evaluated for their effect on tuber russeting and related biochemical and anatomical parameters during 1971 and 1972. Russet Burbank potatoes were irrigated in 1971 to maintain high available soil moisture (between 90% and field capacity) for 0, 3, 6 and...
Resource Type:: Dissertation
Full Text:: PrivacyAbstract approved: Harold W./Youngbrg Management factors used for studies on potato scab control were

Seed yield and yield components of Pennfine perennial ryegrass (Lolium perenne L.) as influenced by time and rate of spring nitrogen and chemical dwarfing

Creator:: Young, William C. (William Clyde)
Abstract:: Seed yield in perennial ryegrass is the product of yield components that develop during the life of the plant. Crop yield potential is defined by the number of fertile tillers, spikelets per spike, and florets per spikelet. It has been shown that perennial ryegrass realizes only a small percentage of...
Resource Type:: Dissertation
Full Text:: would like to express his, sincere gratitude to his major Professor, Dr. Harold W. Youngberg, for the

Site quality of western hemlock and chemical characteristics of some western Oregon andic soils

Creator:: Meurisse, Robert Thomas
Resource Type:: Dissertation
Full Text:: . Youngberg who made it possible for him to complete a program of graduate study. This appreciation is

Some soil factors affecting snowbrush nodulation

Creator:: Scott, William
Resource Type:: Dissertation
Full Text:: . Youngberg for his interest and help throughout this project and for his continued support and advice for

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

Creator:: Chichester, Frederick Wesley
Abstract:: A sequence of soil profiles was sampled along a climate-vegetation transect on the dated Mazama pumice fall in central Oregon. The <2 μ size fraction from each sample was characterized with respect to the relative significance of amorphous and crystalline components, and the individual minerals of the latter group were...
Resource Type:: Dissertation
Full Text:: counsel during the preparation of this dissertation. Special thanks are extended to Drs. C. T. Youngberg

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:: program in Range Management at Oregon State University. Special thanks is due to Dr. Donald W. Hedrick

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Creator:: Black, C. H. (Charles H.)
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGEMENTS I would like to thank Dr. C. T. Youngberg for giving me the opportunity to work on this project

Soil-vegetation relationships withing the ponderosa pine type in the central Oregon pumice region

Creator:: Dyrness, C. T.
Resource Type:: Dissertation
Full Text:: word of appreciation is due Dr. C. T. Youngberg for his constant and enthusiastic help throuiout the

Relationships of clay mineralogy to landscape stability in Western Oregon

Creator:: Taskey, Ronald D. (Ronald David), 1944-
Abstract:: Soil erosion by mass wasting is the major problem on forest lands of the Pacific Northwest, The clay fractions of soils from a large number of sites in Oregon's Western Cascades were characterized in order to determine the relationships of various clay materials to mass movements. Each site was either...
Resource Type:: Dissertation
Full Text:: encouragement which he provided during the course of the study. Thanks go to Dr. C. T. Youngberg for serving

Root symbionts and soil microorganisms associated with actinorrhizal plants

Creator:: Rose, Sharon Lee
Abstract:: Symbiotic associations are established between non-leguminous (actinorrhizal) nitrogen-fixing flowering plants and two categories of microorganisms: mycorrhizal fungi and a filamentous actinomycete. The actinomydete induces nodule formation and produces nitrogenase, the enzyme responsible for the reduction of atmospheric nitrogen to a form available to higher plants. The mycorrhizal fungus is found...
Resource Type:: Dissertation
Full Text:: conclusion: especially Dr. C.T. Youngberg who directed me to this area of investigation; Dr. J.M. Trappe who

ScholarsArchive@OSU

Physiological and agronomic response of potato periderm russeting to measures for control of common scab

Seed yield and yield components of Pennfine perennial ryegrass (Lolium perenne L.) as influenced by time and rate of spring nitrogen and chemical dwarfing

Site quality of western hemlock and chemical characteristics of some western Oregon andic soils

Some soil factors affecting snowbrush nodulation

Clay mineralogy and related chemical properties of soils formed on Mazama pumice

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

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Soil-vegetation relationships withing the ponderosa pine type in the central Oregon pumice region

Relationships of clay mineralogy to landscape stability in Western Oregon

Root symbionts and soil microorganisms associated with actinorrhizal plants

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