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The influence of various levels of nitrogen and potassium fertilizer on yield and performance of seed potatoes (Solanum tuberosum, L.)

Creator:: Mead, Richard M.
Resource Type:: Masters Thesis
Full Text:: writing of this thesis. I would also like to thank Dr. H. W. Youngberg, Dr. E. H. Gardner and Dr. R. E

Tillering, lodging, dry matter partitioning, and seed yield in ryegrass (Lolium spp.) as affected by the plant growth regulator paclobutrazol

Creator:: Hunter, James L.
Abstract:: Seed yield in ryegrass (Lolium spp.) is the product of the number of fertile tillers per unit area and seed weight per spike at maturity. These components of yield develop through a series of growth stages beginning with tiller bud initiation and finishing with seed filling. Environmental conditions during plant...
Resource Type:: Masters Thesis
Full Text:: . Appreciation is extended to Dr. H. W. Youngberg, Dr. E. H. Gardner, and Dr. T. E. Bedell for serving as

Grass seed quality in relation to time of windrowing

Creator:: Dübbern de Souza, Francisco Humberto
Abstract:: This study was undertaken to obtain information on the quality of grass seed when windrowed at the high moisture levels necessary for obtaining maximum yields. A secondary goal was to monitor moisture and temperature fluctuations in the windrow and to relate their effects to development and deterioration of the seed....
Resource Type:: Masters Thesis
Full Text:: friendship and collaboration; Dr. K. L. Chambers, Dr. R. Highsmith, and Dr. H. W. Youngberg, for serving

Spring establishment of orchardgrass and tall fescue seed crops with cereal companion crops

Creator:: Chastain, Thomas G.
Abstract:: Orchardgrass and tall fescue seed crops are commonly springplanted in Oregon, but do not produce a marketable crop during the first growing season. Establishing orchardgrass and tall fescue with cereal companion crops would provide income during the seeding year and could increase seed production profits. This study was conducted to...
Resource Type:: Dissertation
Full Text:: . Youngberg, Dr. K.L. Chambers, Dr. R.G. Petersen, and Dr. R.L. Stebbins for serving on my graduate committee

Effects of growth retardant and nitrogen level on growth, development and yield of Yamhill wheat

Creator:: Nounamo, Laurent
Abstract:: Increases in wheat production due to breeding may be reaching a plateau. The application of N-fertilizer beyond optimum levels leads to lodging and to an increase in tiller death. The use of plant growth regulators (retardants) may be an answer for future increases in production. Experiments were conducted in 1983...
Resource Type:: Dissertation
Full Text:: throughout the duration of this study. I extend my sincere gratitude to Dr. H.W. Youngberg, Dr. T.C. Moore

Comparative study of some soil characteristics of grassland and forest/grassland transition in western Oregon

Creator:: Ezenwa, Matthew Ikechuku Sunday
Abstract:: Vegetation as a soil-forming factor was studied under forest transition and grass while attempting to keep other soil forming factors constant in the western part of the Willamette Valley, Oregon. The physiographic units consist chiefly of the interior foothills and slopes formed from an old basaltic flow with some interspersed...
Resource Type:: Masters Thesis
Full Text:: the author to this goal and beyond; to Dr. G. H. Simonson for intro- ducing me to the soils of 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:: , C. T. Youngberg, W. W. Chilcote, and H. J. Rayner. A special word of thanks is due Dr. C. T

Soil surface application of asphalt in afforestation in semi-arid zones of Iran

Creator:: Kowsar, Ahang
Resource Type:: Dissertation
Full Text:: advisors Dr. C. T. Youngberg, Dr. H. A. Froehlich, and Dr. J. W. Wolfe, and their willingness to serve as

Ozone inhibition of transpiration and photosynthesis of two soybean (Glycine max. [L.] Merr.) cultivars

Creator:: Yingjajaval, Suntaree
Resource Type:: Masters Thesis
Full Text:: wish to thank Dr. C. T. Youngberg, and Dr. H. H. Wickman for their willingness to serve on my

Phytosociology of the ponderosa pine type on pumice soils in the Upper Williamson River Basin, Klamath County, Oregon

Creator:: Volland, Leonard A.
Abstract:: The study was conducted over approximately 191,000 acres in central Klamath County, Oregon. The research had three objectives: first, to describe and classify the seral and near-climax vegetation by using polyclimax principles; secondly, to determine the southern extension of five plant associations and one plant associes as previously described by...
Resource Type:: Masters Thesis
Full Text:: writer is grateful to the members of his graduate committee (Drs. C. E. Poulton, C. T, Youngberg, W

ScholarsArchive@OSU

The influence of various levels of nitrogen and potassium fertilizer on yield and performance of seed potatoes (Solanum tuberosum, L.)

Tillering, lodging, dry matter partitioning, and seed yield in ryegrass (Lolium spp.) as affected by the plant growth regulator paclobutrazol

Grass seed quality in relation to time of windrowing

Spring establishment of orchardgrass and tall fescue seed crops with cereal companion crops

Effects of growth retardant and nitrogen level on growth, development and yield of Yamhill wheat

Comparative study of some soil characteristics of grassland and forest/grassland transition in western Oregon

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

Soil surface application of asphalt in afforestation in semi-arid zones of Iran

Ozone inhibition of transpiration and photosynthesis of two soybean (Glycine max. [L.] Merr.) cultivars

Phytosociology of the ponderosa pine type on pumice soils in the Upper Williamson River Basin, Klamath County, Oregon

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