Index Catalog // ScholarsArchive@OSU

A taxonomic study of bitterbrush (Purshia tridentata (Pursh) DC.) in Oregon

Creator:: Alderfer, Jean Marie
Abstract:: Extensive morphological and growth habit variations have been reported for bitterbrush (Purshia tridentata), a widespread western shrub frequently used in range revegetation projects. Hybridization of this species occurs with cliffrose (Cowania stansburiana) at the point of their overlapping range in Utah and is believed to be responsible for expression of...
Resource Type:: Masters Thesis

A study of morphological variation within Pseudoroegneria spicata (Pursh) A. Löve (Poaceae: Triticeae)

Creator:: Carlson, Jack R.
Abstract:: Chromosome counts were determined for 152 accessions of Pseudoroegneria spicata (Pursh) A. Löve and, combined with existing count data, used to plot the distribution of diploid and tetraploid populations. Morphological variation of 55 characters was examined in five groups totaling 205 operational taxonomic units (OTU's), using cluster, principal factor, and...
Resource Type:: Masters Thesis

Biosystematic studies of the Mimulus moschatus complex in the Pacific Northwest

Creator:: Meinke, Robert James
Abstract:: Populations of an unknown species of Mimulus, herein described as Mimulus hymenophyllus Meinke, were located and studied near Horse Creek, a tributary of the Snake River in eastern Wallowa County, Oregon. The new species is differentiated from its apparent closest relative, Mimulus jungermannioides Suksd., by an annual habit, long petioles,...
Resource Type:: Masters Thesis
Full Text:: committee, Drs. Robert Frenkel, Kenton Chambers, Joseph Beatty, and Jack Lattin for their assistance. I

Interrelation of the components of grain yield in a cross between dwarf and semidwarf wheat (Triticum aestivum L.) cultivars

Creator:: Medina, Luis E.
Abstract:: Parents and progeny populations from a cross of 'Stephens'x 'Tibet dwarf' were grown in a spaced-planted experiment to obtain information concerning the nature of inheritance and possible associations between grain yield and the components of yield. Agronomic traits measured on an individual plant basis were: heading date, days to maturity,...
Resource Type:: Masters Thesis
Full Text:: between dwarf and semidwarf wheat (Triticum aestivum L.) cultivars AN ABSTRACT OF THE THESIS OF Luis E

Response of Cuscuta campestris and Cuscuta indecora to glyphosate applied after attachment to alfalfa (Medicago sativa)

Creator:: Fessehaie, Rezene
Abstract:: The response to glyphosate [N-(phosphonomethyl) glycine] of two dodder species Cuscuta campestris Yuncker (field dodder) and Cuscuta indecora Chiosy (largeseed dodder) parasitizing alfalfa (Medicago sativa L.) was compared. In the absence of glyphosate, alfalfa was killed or severely injured by parasitism from uncontrolled dodder. Results of field experiments in which...
Resource Type:: Masters Thesis
Full Text:: the field work. Dr. Anita Miller, Dr. Kenton L. Chambers, and Mr. Myron Shenk for their dedication

Cordeauxia edulis : production and forage quality in central Somalia

Creator:: Ali, Hussein Mohamed
Abstract:: Availability of evergreen forage plants during the two dry seasons in arid central Somalia is very important. Cordeauxia edulis is a multistemmed evergreen legume shrub which grows in Central Somalia in plant communities dominated by deciduous shrubs. There are two growth forms of this plant. A form with small leaflets...
Resource Type:: Masters Thesis
Full Text:: building experience. Thanks to committee members Dr. Paul S. Doescher and Dr. Kenton L. Chambers for

Effect of cereal companion crops on the establishment of red fescue (Festuca rubra L.) for seed production

Creator:: Chastain, Thomas G.
Abstract:: Some perennial grass seed crops such as red fescue (Festuca rubra L.) do not produce a profitable seed crop during the first growing season. The present establishment method in Oregon for red fescue seed crops generally entails spring planting which does not satisfy vernalization requirements for seed production in the...
Resource Type:: Masters Thesis
Full Text:: University. I am grateful to Dr. David 0. Chilcote, Dr. Kenton L. Chambers and Dr. Conrad J. Weiser for

Persistence and accumulation of clopyralid (3,6-dichloropicolinic acid) in soil

Creator:: Tanphiphat, Karin
Abstract:: Field studies were started at Hyslop Farm, Corvallis, Oregon in 1984 to determine the soil persistence of the herbicide clopyralid (3,6-dichloropicolinic acid) under cropping situations. The herbicide was sprayed on bare soil at the proposed use rate of 0.14 kg/ha in the spring and on the same plots at a...
Resource Type:: Masters Thesis
Full Text:: /ha in the summer. Winter wheat (Triticum aestivum L. 'Stephen') was seeded in the same fall

Activity and persistence of five postemergence grass herbicides in soil

Creator:: Martin, David C. (David Christopher), 1949-
Resource Type:: Masters Thesis
Full Text:: this thesis and for his guidance throughout my graduate program. My thanks to Dr. Kenton L. Chambers

The effect of residue removal and burning on the growth of Festuca longifolia Thuill. and Festuca rubra L. subsp. commutata Gaud. established for seed production

Creator:: Vollmer, Gregory S.
Abstract:: Hard Fescue (Festuca longifolia Thuill.) has potential for in creased turf use but does not respond well to normal seed production management practices in Oregon. Field burning (the normal residue management practice) results in reduced seed yields in commercial hard fescue seed production fields but stimulates seed production in Chewings...
Resource Type:: Masters Thesis
Full Text:: Festuca longifolia Thuill. and Festuca rubra L. subsp. commutata Gaud. established for seed production

ScholarsArchive@OSU

A taxonomic study of bitterbrush (Purshia tridentata (Pursh) DC.) in Oregon

A study of morphological variation within Pseudoroegneria spicata (Pursh) A. Löve (Poaceae: Triticeae)

Biosystematic studies of the Mimulus moschatus complex in the Pacific Northwest

Interrelation of the components of grain yield in a cross between dwarf and semidwarf wheat (Triticum aestivum L.) cultivars

Response of Cuscuta campestris and Cuscuta indecora to glyphosate applied after attachment to alfalfa (Medicago sativa)

Cordeauxia edulis : production and forage quality in central Somalia

Effect of cereal companion crops on the establishment of red fescue (Festuca rubra L.) for seed production

Persistence and accumulation of clopyralid (3,6-dichloropicolinic acid) in soil

Activity and persistence of five postemergence grass herbicides in soil

The effect of residue removal and burning on the growth of Festuca longifolia Thuill. and Festuca rubra L. subsp. commutata Gaud. established for seed production

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