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The relationship of the survival of Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, seedlings to certain soil and other site characteristics on the Tillamook Burn

Creator:: Lowry, Gerald L., 1928-
Resource Type:: Masters Thesis
Full Text:: is extended to Dr. c. T • . Youngberg for his council and guidance . This study was made possi ble

Effect of thinning Douglas-fir on soil moisture, temperature and nitrogen relations

Creator:: André, Johnnie Edgar
Resource Type:: Masters Thesis
Full Text:: the soils department for their help and criticism. Special appreciation is due Dr. c. T. Youngberg

The role of certain non-leguminous woody species in the nitrogen nutrition of some conifer seedlings

Creator:: Wollum, Arthur George
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGEMENTS I 1m especially grateful to my Major Professor, Dr . C. T. Youngberg, for stimulating my

Soil-site relationships in second growth Douglas-fir stands in the central Oregon coast range

Creator:: Urie, Dean Howard
Resource Type:: Masters Thesis
Full Text:: appreciation is due to Dr. C. T. Youngberg for is aid in introducing me to the 80118 of the Douglas- fir

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

First year development of three conifers on surface and exposed subsoil horizons

Creator:: Cochran, Patrick Holmes, 1937-
Resource Type:: Masters Thesis
Full Text:: shown in Figure l. The writer is especially grateful to his major professor, ' Dr. c. T. Youngberg

The effect of soil moisture suction and soil temperature on transpiration, photosynthesis and respiration in Monterey pine (Pinus radiata D. Don)

Creator:: Babalola, Olaoluwa
Abstract:: A special apparatus was developed in which the soil moisture levels of several soil cells could be maintained independently by various osmotic solutions at a selected temperature. The effect of four soil moisture suctions and four soil temperatures on the rates of transpiration, photosynthesis and respiration of monterey pine seedlings...
Resource Type:: Masters Thesis
Full Text:: . Acknowledgements are also made to my major professor, Dr. C. T. Youngberg, for his advice on numerous occasions

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

Nitrogen 15 studies with nonleguminous nitrogen-fixing plants

Creator:: Webster, Stephen Russell
Abstract:: Snowbrush (Ceanothus velutinus), red alder (Alnus rubra), and bitterbrush (Purshia tridentata) are three important nitrogen- fixing nonleguminous species. They commonly grow in association with commercially important conifers in western United States and conceivably could be utilized to add nitrogen to forest ecosystems. Nitrogen 15 gas was used to study nitrogen...
Resource Type:: Masters Thesis
Full Text:: with sincere thanks the interest and guidance offered by Dr. C. T. Youngberg whose efforts provided

Amount and chemical composition of understory vegetation in Alsea basin forest communities

Creator:: Tarnócai, Charles
Abstract:: The understory vegetation was sampled in eight plant communities of a Douglas-fir ecosystem to determine the organic matter production and mineral composition. Four sample sites were selected in each plant community and the understory vegetation sampled using the method of quadrats of successively increasing size. All herbaceous plants were separated...
Resource Type:: Masters Thesis
Full Text:: privacy C. T. oungbe11- g The understory vegetation was sampled in eight plant communi- ties of a

ScholarsArchive@OSU

The relationship of the survival of Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, seedlings to certain soil and other site characteristics on the Tillamook Burn

Effect of thinning Douglas-fir on soil moisture, temperature and nitrogen relations

The role of certain non-leguminous woody species in the nitrogen nutrition of some conifer seedlings

Soil-site relationships in second growth Douglas-fir stands in the central Oregon coast range

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

First year development of three conifers on surface and exposed subsoil horizons

The effect of soil moisture suction and soil temperature on transpiration, photosynthesis and respiration in Monterey pine (Pinus radiata D. Don)

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

Nitrogen 15 studies with nonleguminous nitrogen-fixing plants

Amount and chemical composition of understory vegetation in Alsea basin forest communities

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