Index Catalog // ScholarsArchive@OSU

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

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

Creator:: Culver, Roger Norman
Abstract:: As the management of range lands is intensified or as improvement activity is increased, a critical need is seen to refine the understanding of the ecology of these lands. If soil surveys on range lands are to be meaningful and useful, the relationship between the fundamental ecological units and the...
Resource Type:: Masters Thesis

Some factors that affect pollination and seed formation in alfalfa, Medicago sativa L

Creator:: Bradner, Norman Richard
Abstract:: The objectives of this study were (a) to measure the amount of cross-pollination caused by three bee species at 10, 20 and 40 rods distance from a foreign pollen source, (b) to measure the effects of bee species, planting pattern and season on broad sense heritability estimates for seed yield...
Resource Type:: Dissertation

The distribution, growth habits, and control of German velvetgrass (Holcus mollis L.) in Western Oregon

Creator:: Lee, William O., 1911-
Abstract:: A study was conducted on German velvetgrass (Holcus mollis L.), a weedy, rhizomateous perennial grass introduced in the United States in relatively recent years, The purpose of this study was to learn more about its distribution, growth habits, and control under conditions found in Western Oregon. German velvetgrass infestations of...
Resource Type:: Dissertation

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

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

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

Effects of seeding and grazing on a clearcut-burn in a mixed-coniferous forest stand of the Wallowa mountain foothills

Creator:: Pettit, Russell Dean
Abstract:: Research was conducted in a mixed-coniferous forest stand that was clearcut, burned, and seeded in order to study early plant succession, grazing influences on native and introduced species, big game use, and environmental relationships vegetation, animal, and environmental research was carried out from 1965 to 1967 in three, five-acre exclosures...
Resource Type:: Dissertation

The biology and behavior of the alkali bee Nomia melanderi Cockerell (Hymnoptera: Apoidea)

Creator:: Hackwell, Glenn Alfred
Abstract:: Nomia melanderi Cockerell is one of the most efficient pollinators of alfalfa in Eastern Oregon. Emergence begins in June, usually reaches its peak in early July, and may continue into early August. Male emergence precedes female emergence by four or five days. For the first few weeks of this time,...
Resource Type:: Dissertation

Environmental and genetic factors affecting seed set in Dactylis glomerata L.

Creator:: West, David L.
Abstract:: Field, growth chamber, and greenhouse studies were carried out to evaluate factors that cause low seed set in Dactylis Glomerata L. The variety, 'Latar', and the parental clones of the variety, 'Pennlate', were studied in detail. Floral anatomy investigations indicated that 98 percent of Dactylis flowers opened at Corvallis in...
Resource Type:: Dissertation

ScholarsArchive@OSU

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

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

Some factors that affect pollination and seed formation in alfalfa, Medicago sativa L

The distribution, growth habits, and control of German velvetgrass (Holcus mollis L.) in Western Oregon

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

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

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

Effects of seeding and grazing on a clearcut-burn in a mixed-coniferous forest stand of the Wallowa mountain foothills

The biology and behavior of the alkali bee Nomia melanderi Cockerell (Hymnoptera: Apoidea)

Environmental and genetic factors affecting seed set in Dactylis glomerata L.

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