Six, recent clear cut areas were selected in the Douglas-fir
zone of the Western Cascade Range of Oregon to determine the
environmental and nutritional effects that snowbrush has on the establishment
and growth of Douglas-fir seedlings.
One thousand eighty milacre sample plots on the six clear cuts
were used to...
Research was conducted in a mixed-coniferous forest stand
that was clearcut, burned, and seeded in order to study early plant
succession, grazing influences on native and introduced species, big
game use, and environmental relationships vegetation, animal,
and environmental research was carried out from 1965 to 1967 in
three, five-acre exclosures...
Levels of ⁶⁵Zn in water, sediments, plants, and animals in
Alder Slough, a small ecosystem in the Columbia River Estuary,
were determined periodically during a one year period. Concentrations
of total Zn in organisms were also measured to permit
computation of specific activities (μCi⁶⁵Zn/g total Zn). Temporal
fluctuations in the...
Four-fold partially purified glucose-6-phosphate dehydrogenase
(G-6-PDH) from the obligately psychrophilic marine bacterium
Vibrio marinus was effected by thermally induced leakage of the
enzyme, ammonium sulfate fractionation and column chromatography
on Sephadex G-200 gel.
The effects of temperature, pressure, salinity, and pH were
determined for the various degrees of enzyme purity....
Seed of Cougar and Newport Kentucky bluegrass (Poa pratensis L.)
was harvested at Pullman and Spokane at several stages of maturity.
Variations in seed attributes resulting from environmental and maturity
effects were evaluated through germination tests, tetrazolium staining,
seed moisture and seed weight determinations. Seedling vigor was
determined by .speed...
Radioactive chromium-51, a waste byproduct from operation
of nuclear reactors at Hanford, Washington, has been followed down
the Columbia River and into the Pacific Ocean. Chemical factors
influencing the partitioning of ⁵¹Cr between solution and sediment
have been considered.
Chromium-5l, in a hexavalent oxyanion when introduced into the
Columbia River,...
Commerical preparations and published formulations using reagent chemicals for seawater substitutes were not biologically acceptable to Mytilus edulis embryos, in that calcification did not occur. When Leslie coarse hide salt was used as the source of NaCl for literature formulations, most formulas provided some success in the development, growth and...
The nonagricultural lands of the world are being called upon today to satisfy tremendous
demands from society at all levels of economic development. Until recently, costs of management
of many of these lands were too high to warrant appreciable management investment for
the relatively low yields. Society is beginning to...