Index Catalog // ScholarsArchive@OSU

Modeling the uncertainty of evapotranspiration estimates

Creator:: El Khoury, Laureine
Abstract:: Under today's environmental conditions and with the increasing worldwide competition for water, errors in irrigation management decisions can be costly. Therefore, providing both accurate evapotranspiration estimation on a daily basis and estimation of the magnitude of error associated with this estimate is vital for informed water management decisions that allow...
Resource Type:: Masters Thesis
Full Text:: acknowledge Dr. Richard Snyder for sharing his knowledge, critiquing my work, and providing insights

Response of brood-rearing habitat of sage grouse to prescribed burning in Oregon

Creator:: Pyle, William H. (William Hanson), 1957-
Abstract:: Decline of western sage grouse (Centrocercus urophasianus phaios) in Oregon may be related to the reduced availability of foods in upland sagebrush (Artemisia)-grasslands used for brood-rearing. The goal of this study was to determine primary foods of chicks and the short-term response of brood-rearing habitat to prescribed burning at Hart...
Resource Type:: Masters Thesis
Full Text:: , and Dr. Stanley Snyder; each of them afforded excellent advice as members of my graduate committee. I

The use of relaxation to solve harvest scheduling problems with flow, wildlife habitat, and adjacency constraints

Creator:: Torres-Rojo, Juan Manuel
Abstract:: Lagrangean relaxation is presented as a solution technique to solve flow constrained area-based harvest scheduling problems. The best set of multipliers in the Lagrangean approach is obtained through the subgradient method. Guidelines to set some parameters to compute the step size in the subgradient algorithm are provided. An additional procedure...
Resource Type:: Dissertation
Full Text:: to thank Dr. Jeffrey L. Arthur and Dr. Richard Adams for serving in my committee. Finally I want

Mapping the potential acidic deposition in southwestern California using ambient air concentrations of acid precursors

Creator:: Doherty, David D.
Abstract:: Attempts to map the distribution of acidic deposition have been inadequate, particularly in areas of seasonal or limited rainfall. Ambient air concentrations of acid precursors may be used to monitor and map the distribution of potential acidic deposition. A network of stations in California currently monitor these ambient air concentrations....
Resource Type:: Capstone Project
Full Text:: . The 1979 mean annual daily hourly maximum ambient air concentrations for each 14 San Franc scoL L

Life history, production, and food resources of the deposit-feeding polychaete Euzonus mucronata (Treadwell) on an Oregon coastal sand beach

Creator:: Kemp, P. F.
Resource Type:: Dissertation
Full Text:: . Biomass and production were estimated using the weight-length regression: log W 2.954(log L)-.987 (n 72

Life-history, growth and interference of cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.)

Creator:: Sheley, Roger Leslie
Abstract:: Cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea soistitialis L.) have invaded over 3 million ha of grasslands in the western U.S. Future management will require an understanding of the conditions, mechanisms, and processes which control species dominance, community dynamics, and desirable plant establishment in these alien dominated annual rangelands....
Resource Type:: Dissertation

The field edge flux paradox

Creator:: Barr, Colleen M.
Abstract:: Precision irrigation has made spatially explicit water management a reality. However, detailed knowledge about the spatially variable evapotranspiration is often unavailable. One example location where we can begin to understand the impact of spatial variability on evapotranspiration is at the field edge, which contains a sharp discontinuity in surface conditions....
Resource Type:: Masters Thesis
Full Text:: develop as a scientist. Thanks also to my other committee members, Richard Cuenca, Kellie Vache, and

The movement and adsorption of sulfate ion in soil systems

Creator:: Chao, Tsun-tien
Resource Type:: Dissertation
Full Text:: the rnetherc of his program committee: Dra. Moyle E. Harward, Thom L. Jaok.9on, Richard O

Chloride fertilizer effects on grain yield, water potential components and disease severity of winter wheat with take-all

Creator:: Mitchell, Becky
Abstract:: Take-all root rot (caused by Gaeumannomyces graminis var. tritici, Ggt) is one of the major diseases limiting winter wheat yields in western Oregon. Losses caused by take-all (TA) can be significantly reduced through crop management and fertilization practices. Results from field experiments in western Oregon show that the use of...
Resource Type:: Masters Thesis
Full Text:: his patience, and role as major professor, editor and guide. To Drs. Robert L. Powelson, Richard P

Osmotic stress vigor test for wheat seed

Creator:: Currans, Sean
Abstract:: Seed vigor tests have been developed to evaluate the relative ability of seed lots to produce stands of seedlings in the field. Some workers have suggested the possibility of differentiating vigor levels by germinating seeds under osmotic stress, but have not conducted field trials to evaluate the usefulness of the...
Resource Type:: Masters Thesis
Full Text:: Oregon State Uni- versity and for his help, time and advice. I am grateful to Dr. Richard L. Clinton

ScholarsArchive@OSU

Modeling the uncertainty of evapotranspiration estimates

Response of brood-rearing habitat of sage grouse to prescribed burning in Oregon

The use of relaxation to solve harvest scheduling problems with flow, wildlife habitat, and adjacency constraints

Mapping the potential acidic deposition in southwestern California using ambient air concentrations of acid precursors

Life history, production, and food resources of the deposit-feeding polychaete Euzonus mucronata (Treadwell) on an Oregon coastal sand beach

Life-history, growth and interference of cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.)

The field edge flux paradox

The movement and adsorption of sulfate ion in soil systems

Chloride fertilizer effects on grain yield, water potential components and disease severity of winter wheat with take-all

Osmotic stress vigor test for wheat seed

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