Desde hace muchos años, los jardineros han usado
el compost para mejorar la tierra. Hoy en día también
es una manera importante de reducir la cantidad de
basura que se quema o se añade a los vertederos
públicos. Los desperdicios de jardín y cocina
constituyen hasta el 20 por ciento...
Pacific Northwest vegetable and fruit growers always have faced changing markets. To many growers, these changes have seemed faster than usual in recent years, fueled by shifting consumer preferences, increasing production costs, and new market logistics. The number of processing plants in the region continues to decline. Typically, plant closures...
The fertilizer value of anaerobically-digested, dewatered biosolids in dryland cereal cropping systems was evaluated at six locations in central and eastern Washington (25 to 35 cm annual precipitation zone). Biosolids were applied at rates of 3 to 20 Mg/ha (approximately 150 to 900 kg N/ha). We measured increases in soil...
Since the collapse of World Trade Center building number seven (WTC7), significant research has been done to understand the behavior of steel structures in fire and enable engineers to account for the behavior of steel framing systems exposed to fire during design. Despite these efforts, there are still significant barriers...
New ice cores retrieved from the Taylor Glacier (Antarctica) blue ice area contain ice and air spanning the Marine Isotope Stage (MIS) 5/4 transition, a period of global cooling and ice sheet expansion. Chronologies were determined for the ice and air bubbles in the new ice cores by visually matching...
Forest managers in the Blue Mountains, of northeastern Oregon are currently faced with
vast areas of forests with health problems and high fuel loadings. These conditions
resulted from a combination of insect infestations, past management practices and the
elimination of fire from the local ecosystems. These forests are now overstocked,...
This document provides an overview of a presentation held during the Industry and Policy Day at the IIFET 2016 Scotland conference in July 2016. The presentation was part of Session A4: Global Market: Connections and Prospective Opportunities. The session was chaired by Maarten Mens, and the presentation was given by...
We model a fish population in a spatial region comprising a marine protected area and a fishing ground separated by an interface. The model assumes conservation of biomass density and takes the form of a reaction diffusion equation with a logistic reaction term. At the interface, in addition to continuity...
This study was initiated in its original form in 1982 with the Yamhill Soil and Water Conservation District and the McMinnville Field Office of the USDA-Soil Conservation Service. The Soils Department, Oregon State University, was one of several cooperators, in part funded by The Wine Advisory Board.
In 1984 and...
Over the past twenty years, the national three-year graduation rate for community college students has ranged from 44% to roughly 31% in 2013 (NCES, 2013). As a way to address such low graduation rates, colleges have implemented a myriad of services and programs (i.e., tutoring, mentoring, etc.). Another intervention is...
Several bean yellow mosaic virus (BYMV) strains, presumably
not transmissible by aphids, were studied to determine the biological
and environmental conditions which would possibly result in aphid
transmission of these strains. Investigations were made to study the
effect of different aphid rearing conditions on the transmission
frequency of BYMV. Also,...
A study of the oxidation of zircaloy in reactor
environments has been undertaken with the goal of
characterizing of the Thermal Gradient Test Facility
(TGTF) at Teledyne Wah Chang, Albany. A set of
oxidation models is presented from the literature, as
well as an extensive database of published oxidation
test...
Monocrotaline (MCT) is a member of a class of naturally occurring
phytotoxins known as pyrrolizidine alkaloids (PAs). Exposure to PAs can result
in liver and cardiopulmonary lesions as well as lymphoid organ atrophy. In the
present study C57BI/6 (B6) mice received MCT (0-150 mg/kg/day, po) for 14
days. Overt toxicity...
Stream channel stability for two tributaries of Rock Creek in the
Oregon Coast Range is evaluated by application of a Stream Reach Inventory.
Stability nomographs are constructed for graphical analysis of
erosion potential. Results indicate that channel stability can be
classified. One stream is rated as 'Poor' in resistance to...
This research sought to explore the implications of different tenure regimes for both
landscape-level ecological processes and the overall resilience of a social-ecological
system in Central Oregon. The purchase by an investor of former industrial timberlands
known as the Bull Springs tract raised the specter of dispersed residential development on...
Armillaria (Fr. ex. Fr.) is a parasite whose pathogenicity
and role in forest ecosystems often depends upon the
physiological condition of the tree. Therefore, I tested the
frequency and severity of Armillaria ostoyae (Romagn.) Herink
infection among Abies grandis (Dougl.) Lindl., Larix
occidentalis Nutt., Pinus contorta var. latifolia (Engelm.),
Pinus...
An energy balance analysis was performed on each of four
transplanted Douglas-fir [Pseudotsuga menziesii (Mirb.) Francol
seedlings growing on two cutover sites in southwestern Oregon. The
two sites were a clearcut and a partial-cut (shelterwood) side by
side, with a pair of seedlings used on each site. One seedling of...
The spreadsheet has become a common technology tool and is now a predominant form of end-user programming. Some of the same features that make spreadsheets excellent tools for ad-hoc development can introduce errors into the final product. Although a variety of research has been performed investigating methods to detect errors...