Published July 1992. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Differential grain yield response of two winter wheat cultivars
('Yamhill' and'McDermid) when grown on acid soils prompted this investigation.
Root samples were taken at two soil depths at late
tillering and anthesis from plots established on an acid nonpareil
soil in Douglas County, Oregon. The soil pH was 5.2-5.3 and...
Upper Klamath Lake (UKL) and Agency Lake in south-central Oregon are hypereutrophic due to phosphorus (P) loading from both geologic and agricultural sources in the watershed. Restoring historic lake-fringe wetlands to provide P sinks around the lakes has been accepted as a favorable means of reducing lake P levels and...
Published September 1985. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Epigenetic variation is likely to contribute to the phenotypic plasticity and adaptative
capacity of plant species, and may be especially important for long-lived
organisms with complex life cycles, including forest trees. Diverse environmental
stresses and hybridization/polyploidization events can create reversible heritable
epigenetic marks that can be transmitted to subsequent generations...
Soil organic matter levels, soil temperature and moisture, and vegetation properties were measured along a sequence of death and
regeneration in a mountain hemlock (Tsuga mertensiana) forest. The sequence is produced by slowly moving waves of the root pathogen Phellinus weirii. While analysis of variance for all sampled soil layers...
The abundance and spatial heterogeneity of coarse woody debris (CWD) on the forest floor is a prominent feature of Pacific Northwest (PNW) forest ecosystems. The effect of CWD on soil solution chemistry, nutrient cycling and availability, soil physical structure and formation of soil organic matter, however, remains unknown. Therefore, studies...
The objectives of this study were to evaluate the performance of wood-frame shear walls under monotonic and cyclic loads by: 1) determining variability of shear wall performance; 2) comparing performance of walls under each loading protocol; 3) evaluating effects of anchorage on wall perfor-mance; and 4) evaluating performance of walls...