Application of herbicides to the soil has become an important
factor in the production of row crops. Economic production
of sugar beet (Beta vulgaris), an important row crop, requires
efficient methods of weed control.
Two experimental herbicides, 3-cyclohexyl-5,6-trimethylene
uracil (DP634) and 2-bromo-6't-butyl-o-acetotoluidide (CP32179),
had shown promise in sugar beet screening...
The purpose of this thesis is to examine the problem of the
increasing competition between recreation and irrigation at Wallowa
Lake. Originally Wallowa Lake was an abundant source of fish for
the Indians but the advent of irrigation in the area by the early settlers eliminated the blueback salmon (oncorhynchus...
Some effects of hormone treatment on feedlot heifers were
studied. The treatments were 15 mg diethylstilbestrol (DES) implant,
Synovex H implant, .25 mg oral melengestrol acetate (MGA)
per head per day, and .40 mg oral MGA per head per day. One
hundred heifers, 20 to each treatment, were used. All...
Land useable for livestock grazing in the western United States is
diminishing because of spreading municipalities, irrigation developments,
highway construction, recreational demands and withdrawals.
Concurrently, the demand for livestock and livestock products is increasing
because of a rapidly growing population. As a result, production
from the grazing land that remains...
Studies were conducted from 1962 to 1966 to investigate the
effectiveness of several practices in manipulating medusahead
(Taeniatherum asperum (Sim. ) Nevski) infested and/or dominated
ecosystems by releasing competition in favor of perennial grasses.
Several herbicide treatments were evaluated for selective
control of medusahead and cheatgrass (Bromus tectorum L. )...
Sheep and cattle dietary preferences were determined on tall fescue-subclover ( Festuca arundinacea-Trifolium subterraneum) and
perennial ryegrass-subclover (Lolium perenne-Trifoliuni subterraneum)
pastures in western Oregon during the spring and summer periods
of 1964 and 1965. Esophageal-fistulated Willamette ewes and
Hereford and Hereford-Angus yearling cattle were grazed separately
on each pasture mixture...
A fluorescent dye, 1-dimethylaminonaphthalene-5-sulfonyl
chloride (dansyl chloride), was covalently bonded to polylysine. The
dansyl tagged polylysine was complexed to DNA by gradient dialysis.
The polarization and intensity of fluorescence of the dansyl and the
turbidity of the complex were measured as a function of salt concentration
for a variety of...
The foraminiferal population of Yaquina Bay was investigated
to attempt a correlation of seasonal changes in the hydrography with
observed changes in the faunal distribution patterns. The results
are based on data from two spatial surveys conducted in July 1966,
and late February and March, 1967.
The hydrography of Yaquina...
Thirty-six female guinea pigs were placed on a scorbutogenic
diet for 14 days and then divided into groups of four. Three groups
received adrenocorticotropic hormone (ACTH) with each group given
10, 20, or 40 units. Three groups each received 50 mg of ascorbic
acid and three groups received 50 mg...
Published January 1960. 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
Published February 1968. 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
Published October 1960. 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
A total of five individual experiments were conducted with
gonadectomized, male sheep to study the influence of estrogen on
the plasma level of pituitary activities, with the greatest emphasis
given to gonadotropic activity. Estrogen treatments employed were
as follows:
1. 12 mg. diethylstilbestrol (DES) implanted subcutaneously.
2. 1 mg. DES...
The effect of entering streamflow on currents of a density
stratified reservoir has been studied in a laboratory model to
provide insight into the prediction, control, and maintenance of
quality water discharge from a thermally stratified reservoir.
Twenty experiments were performed using various concentrations
of a sodium chloride solution to...
The study was conducted on the Ochoco National Forest in
central Oregon. Vegetation-soil relationships were evaluated for the
following objectives: 1. Develop a sound ecological foundation on
which total land management decisions may be based. 2. Evaluate
forest succession, stocking, and growth to improve management.
3. Develop accurate range condition...