A study investigating the effect of sheep stocking density and grazing duration on forage intake, grazing efficiency, dietary selectivity and subsequent forage accumulation in tall fescue(Festuca arundinacea)- subclover(Trifolium subtaranium) pastures was conducted near Corvallis, Oregon during early and late spring in 1988 and 1989. Grazing treatments were 2, 6, and 10-day duration and corresponding stocking densities 380, 130, 78 and 1390, 460 and 280 ewes/ha during early and late trials each year, respectively. Average daily intake and grazing efficiency were highest (P< 0.05) in the 10-day duration and lowest in the 2-day duration. During the first 2 days of all duration treatments, average daily intake decreased as stocking density increased (P< 0.05). Manure cover and crowding stress may explain lower average daily intake under the shorter duration/high density treatments. However, stocking density had little effect on grazing efficiency. This was largely due to the high amount of forage destroyed under the low density treatments which offset the effect of higher forage intake of that treatment. Within the 10-day duration treatment, average daily intake was the same over time (P> 0.05), while grazing efficiency decreased as grazing progressed (P< 0.05). The low grazing efficiency during the early stages of grazing reflected high initial forage destruction probably caused by the movement of animals at the start of grazing to establish bedding and habitual use areas. Growth rate of forage after grazing was highest in the longer duration paddocks and lowest in the shorter duration paddocks (P< 0.05), but the yield was similar under all treatments (P> 0.05). Although short duration/high density grazing is considered to be non-selective, sheep were equally or more selective under very short duration/very high density compared to longer duration/lower density treatments in this study. The 2 days duration was not an attractive management option since the intake and grazing efficiency were low, and the animals were selective. / Graduation date: 1993

Set in mythical Humble County, Georgia, Days of the Endless Corvette tells the story of Earl Mulvaney, a high-school dropout and auto mechanic. Earl loves Ellen, the brainy and beautiful girl next door, who unfortunately must marry Troy, the star of the high school football team. Throughout the book Earl labors on his “Endless Corvette,” a project as impossible as trying to build a perpetual motion machine. Earl has noticed that each time he takes something apart and rebuilds it, there are leftover parts. He reasons that by disassembling and reassembling his boss’s ’59 Corvette, and saving the leftover pieces each time, eventually he will have enough parts to build an entire car, leaving the original behind. The novel ends with the suggestion that perhaps Earl has succeeded at his project, which stands as a metaphor not only for Earl’s hopeless love, but other searches for answers to life’s perplexities.

Thesis (Ph. D.)--Institute of Paper Chemistry, 1943. / Bibliography: leaves 69-72.

This case study used ethnographic data collection tools to focus on the educational models and approaches used by the Tall Pines Quilt Guild (TPQG) in Huntsville, Texas. In this study I strove to explore the transfer of quiltmaking knowledge in a community-based art education organization, a quilt guild, and how those educational methods and models could be adapted to the museum setting. I became a member of the Guild and took on the research role of a participant observer to witness how the TPQG perpetuates the quilting craft for its members. Through observing various Guild events, such as monthly meetings, workshops, and bees I found the members frequently participated in cooperative and collaborative social learning. The rationale for undertaking this study was that there are many publications on how to make quilts, the history of quilt patterns, indexes of quilt patterns, quiltmakers' stories, quilt research, and quilt exhibition catalogues. However, proper documentation of the educational approaches used by women in quilt guilds has not been researched. Quilt guilds provide an environment where adults can learn and expand their knowledge about the quilting craft in the form of lifelong learning. By looking into how the Tall Pines Quilt Guild acts a community-based art education organization, the identified educational models used by quilt guilds could be employed at museums displaying quilt exhibits with potential program models and characteristics to inform the public about quilts, quiltmaking, and quilters. / text

published_or_final_version / Architecture / Master / Master of Architecture

published_or_final_version / Surveying / Master / Master of Philosophy

In making the point that no story is complete, O'Hagan undermines to varying degrees several dominant and interconnected Western ideologies: idealism, Christianity, patriarchy, class and capitalism. He also shows how a borrowed indigenous myth can be adapted to immigrant needs in a way that will distinguish Canadian novels from others.

I investigated how orchid biology, floral morphology, and diversity of surrounding floral and pollinator communities affected reproductive success and hybridization of Cypripedium candidum and C. parviflorum. Floral dimensions, including pollinator exit routes were smallest in C. candidum, largest in C. parviflorum, with hybrids intermediate and overlapping with both. This pattern was mirrored in the number of insect visitors, fruit set, and seed set. Exit route size seemed to restrict potential pollinators to a subset of visiting insects, which is consistent with reports from other rewardless orchids. Overlap among orchid taxa in morphology, pollinators, flowering phenology, and spatial distribution, may affect the frequency and direction of pollen transfer and hybridization. The composition and abundance of co-flowering rewarding plants seems to be important for maintaining pollinators in orchid populations. Comparisons with orchid fruit set indicated that individual co-flowering species may be facilitators or competitors for pollinator attention, affecting orchid reproductive success.

No description available.

Tall fescue is the most common cool-season grass in the eastern USA, with broad economic and ecological importance to the region. Tall fescue is known to associate with a fungal endophyte, Neotyphodium coenophialum, whose presence can decrease biotic and abiotic stress experienced by the plant. This thesis evaluates the response of tall fescue and the fungal endophyte symbiosis to predicted climate change. I participated in two multi-factor climate change projects where I investigated the response of tall fescue tissue chemistry and growth to various climate change factors. Endophyte-infected (E+) tall fescue had decreased alkaloid production under elevated CO2 but increased alkaloid production under elevated temperatures. Significant differences between E+ and E- (endophyte-free) tall fescue tissue chemistry were also found, suggesting the endophyte interacts with the plant response to abiotic stress. Although several studies have reported benefits of endophyte infection for tall fescue growing under drought stress, my research found no differences between E+ and E- total growth and surprisingly showed increased mortality of E+ individuals under elevated temperature. Taken together, my research indicates that this grass-fungal relationship will respond to climate change, and may produce dramatic and unforeseen results that question the widely believed mutualistic nature of the symbiosis.