Fabricated steel beam specimens with rectangular holes cut in
the webs were subjected to load tests to analyze the behavior of the
modified section. Beam-depth to hole-depth ratio was in all cases
2.0; however, ratio of hole length to hole height varied from 2.0 to
3.0. The primary instrumentation of...
Spring grazing of annual ryegrass (Lolium multiflorum L.) seed
fields with sheep is a common practice in the Willamette Valley of
Oregon. However, the effect of grazing on seed yield in Oregon has
not previously been investigated. This experiment was designed to
determine the effects of duration of spring grazing...
Seed yield in perennial ryegrass is the product of yield components
that develop during the life of the plant. Crop yield potential is
defined by the number of fertile tillers, spikelets per spike, and
florets per spikelet. It has been shown that perennial ryegrass
realizes only a small percentage of...
A registered flock of Hampshire sheep that had been predominantly
closed for approximately 30 years was utilized to study the
effects of inbreeding on productivity of the 1980 and 1981 lamb crops.
Five generation pedigrees for ewes and rams were used to calculate
inbreeding coefficients. The median inbreeding coefficient of...
Soil effects from mountain beaver (Aplodontia rufa ) burrowing were
investigated in Oregon Coast Range soils formed from Tyee sandstone. The potential
for observed changes in soil to affect productivity was assessed. Soil horizons from
mountain beaver mound soil and adjacent unmounded profiles were collected with a
monolith-type quantitative sampler....
Forty perennial and 12 annual grass varieties were evaluated for seed production potential at Corvallis, Oregon. Perennial ryegrass, orchardgrass, Kentucky bluegrass, red fescue, Chewings fescue, tall fescue, and annual ryegrass were included in the study. Results of 1986 and 1987 harvest years are reported.
