Index Catalog // ScholarsArchive@OSU

Creator:: Walburger, Kenric
Abstract:: Three studies were conducted to evaluate different grazing systems on mixed conifer rangelands in eastern Oregon, and photo points and aerial photography was used to determine effects of 25 years of cattle grazing on stream channel changes and vegetation responses. The first study was designed to determine if grazing treatment...
Resource Type:: Masters Thesis
Full Text:: the creek in 1990, by the LaGrande Range District as part of a PNW Research Station project, to

Creator:: Walburger, Kenric J.
Abstract:: The objectives of the experiment were to: 1) determine the relationship between overstory canopy cover and ungulate herbivory on understory production composition and diversity and 2) determine the effects of timber harvest, ungulate herbivory and season of use on botanical composition and nutritional quality of beef cattle diets. Three randomly...
Resource Type:: Dissertation
Full Text:: Relationship of Tree Overstory and Herbaceous Understory Vegetation. Journal of Range Management. 20: 247-249

Creator:: Damiran, Daalkhaijav
Abstract:: Four studies were conducted on late-summer diet quality and quantity of cattle (Bos taurus), mule deer (Odocoileus hemionus hemionus), and elk (Cervus elaphus) in response to prior grazing by cattle and elk on mixed-conifer rangelands and on related research techniques. In our first study we assessed a photographic technique to...
Resource Type:: Dissertation
Full Text:: . California Fish and Game 70:240-247. Canon, S. K., P. J. Urness, and N. V. DeBule. 1987. Foraging behavior

Creator:: Wyffels, Samuel A.
Abstract:: This study evaluated the influence of cattle stocking density on botanical composition of diet, diet preference, and cattle performance on the Zumwalt Prairie in Northeastern Oregon. In each of two years, 192 cow-calf pairs (549.27 kg, BCS = 4.89) and 48 yearling heifers (383.34 kg, BCS = 5.02) were stratified...
Resource Type:: Masters Thesis
Full Text:: U.S. Department of Agriculture, Forest Service, General Technical Report. PNW-GTR-325

Creator:: Averett, Joshua P.
Abstract:: Invasion by non-native plants into natural areas is an important component of global change that threatens biodiversity and ecosystem structure and function. Mountains are currently among the least invaded ecosystems, however, these biodiversity hotspots are increasingly under threat of exotic plant invasion. Evaluation of plant species distribution patterns in mountain...
Resource Type:: Masters Thesis

Creator:: Morrison, Julie A.
Abstract:: The objective of this study was to evaluate the influence of cow age on grazing distribution relative to mountain riparian areas. In each of two years, sixty cow-calf pairs were stratified by age into the following treatments: 1) thirty first calf heifers (442 kg, body condition score (BCS)=4.5), and 2)...
Resource Type:: Masters Thesis

Creator:: Brandyberry, Steven D.
Abstract:: A study was conducted to determine effects of year and season on diet quality of beef cattle grazing northern Great Basin rangelands from 1990 to 1993. Forage quality was high early in the growing season, then declined as seasons progressed (P<.05). Plant chemical composition was higher early in the growing...
Resource Type:: Dissertation
Full Text:: -year average. 247 LIST OF TABLES Table Page 1. Chemical composition of diets selected by

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