The curriculum of technical degrees at higher education institutions in the United States needs to continuously adapt to ever changing technologies. One way to accomplish this is to adopt a more dynamic approach that separates the practical and theoretical components of the university education, and where the student concentrates on...
The development of winter 6-row malting barley varieties is an objective of the OSU program. The program's winter germplasm is quite susceptible to Barley Yellow Dwarf Virus (BYDV). The program recently released the spring 2-row variety Orca, which carries the Yd2 gene for BYDV resistance. The objective of this project...
South American waterweed, Elodea densa (Planch.) Casp., and Coontail Ceratophyllum demersum L., were studied for their potential to take up chromium and zinc and as a possible indicator of arsenic, cadmium, copper, and lead pollution. Plants were collected from the Willamette River in Oregon and exposed for 48 hours to...
A broad range of factors influence wine grape quality and manipulation of these factors has stimulated interest among grape growers, wine makers, and research scientists alike. One such factor affecting wine grape quality is crop level, particularly for Pinot noir. Since the capacity of a vine to ripen fruit depends...
Seasonal reducing conditions play an important role in the cycling of nutrients and soil pore water chemical constituents in the Willamette Valley. Long periods of soil saturation lead microorganisms utilizing organic matter as their carbon source to find alternative electron acceptors other than oxygen. Once oxygen has been depleted microorganisms...
Squash varieties of Golden Delicious and Squash Hybrid NK 530 were grown in disk-till, strip-till, and no-till conservation tillage systems following a cover crop of'Monida' oats (Avena sativa L.) and common vetch (Vicia sativa L.). Tillage systems were evaluated for effects on squash emergence and yield, weed density and biomass,...
Contamination of water sources due to the use of agricultural chemicals can be minimized through understanding the transport relationships for organic chemicals in soil environments. In this study we evaluated seven non-hazardous dyes that have properties which were consistent with application as surrogates to organic agro-chemicals to assess mobility through...
Much interest has recently been shown in using fecal samples to monitor
hormone concentrations in free-roaming animal populations. This process is noninvasive
and, therefore, provides easy sample collection and assures no stress-related,
physiological responses that might alter the hormonal data. Concerns have been
expressed, however, that the hormone concentrations detected...
Ontogenetic niche shifts are critical times in a fish's life that need to be passed for
survival, growth and recruitment (Gerking 1994, Osenberg et al. 1994). These niche
shifts are identified by a change in feeding from one prey type to another. These shifts in
feeding occur throughout growth and...