Index Catalog // ScholarsArchive@OSU

"The Island" Research Natural Area : a vegetation study with time and location comparisons

Creator:: Fox, M. Anne, 1939-
Abstract:: The purpose of this study was to document vegetation on "The Island", a Research Natural Area at the confluence of the Crooked River and the Deschutes River in central Oregon's Juniperus occidentalis Zone and to compare the results with an earlier study reported in 1964 from 1960-'61 data. Present-day comparisons...
Resource Type:: Masters Thesis

A comparative study of two land classification systems for use with remote sensor data

Creator:: McDaniel, Kirk C.
Abstract:: Two standardized land classification systems designed for use with remote sensor data were studied comparatively. One of tile classification systems is proposed for review and testing in U. S. 0.S. Circular 671 (Legend I) (Anderson et al., 1972); the other is a hierarchial legend system in use since 1968 (Legend...
Resource Type:: Masters Thesis

A comparison of four methods used in determining the diets of large herbivores

Creator:: McInnis, Michael Lindsay
Abstract:: Esophageal fistulation, stomach content analysis, fecal analysis, and ocular-estimate-by-plot are four of the most publicized methods of determining the diets of large herbivores. The principal objective of this study was to compare the relative values of each of these methods based upon information collected from bi-fistulated (esophageal and rumen) sheep...
Resource Type:: Masters Thesis

A taxonomic study of bitterbrush (Purshia tridentata (Pursh) DC.) in Oregon

Creator:: Alderfer, Jean Marie
Abstract:: Extensive morphological and growth habit variations have been reported for bitterbrush (Purshia tridentata), a widespread western shrub frequently used in range revegetation projects. Hybridization of this species occurs with cliffrose (Cowania stansburiana) at the point of their overlapping range in Utah and is believed to be responsible for expression of...
Resource Type:: Masters Thesis

An Investigation of soil, vegetation and mycorrhizal characteristics associated with native grass re-esablishment in crested wheatgrass seedings

Creator:: Raven, Karen A.
Abstract:: Since the 1930's, many fields on the Crooked River National grasslands have been seeded to crested wheatgrass (Agropyron desertorum). While some of these fields remain dominated by crested wheatgrass others had a greater presence of deep rooted native perennial grasses such as bluebunch wheatgrass (Pseudoroegneria spicata). Twenty eight fields previously...
Resource Type:: Masters Thesis

Application of stream classification and historical land uses for managed riparian systems of Eastern Oregon

Creator:: Zweygardt, Louanne R.
Abstract:: Twelve stream segments in the Silvies River drainage system were classified in the fall of 1993 and again in 1994, using a morphological classification of natural rivers (Rosgen 1994). Bankfull flow of stream channels is the key feature of this system. Measurement of bankfull is used in the calculation of...
Resource Type:: Masters Thesis

Assessment of a Douglas-fir/sheep silvopastoral system in western Oregon

Creator:: Lamouri, Abdelwahed
Abstract:: This research was designed to evaluate the effect of sheep grazing on Douglas-fir water potential, growth, and understory forage production in a small-scale silvopastoral agroforestry system, at Peavy arboretum approximately 13 km North of Corvallis, Oregon. Treatments examined included all possible combinations of two sheep grazing management treatments (grazed vs....
Resource Type:: Masters Thesis

Assessment of impacts of Canada geese on wheat production

Creator:: Louhaichi, Mounir
Abstract:: Numbers of wild Canada geese (Branta canadensis) have increased dramatically during the past 30 years in the lower Columbia and Willamette Valley systems. The damage they cause by grazing and trampling plants can be substantial. The objectives of this research were to: 1) Develop methods that provide reliable estimates of...
Resource Type:: Masters Thesis

Autecology of three perennial grasses relative to microenvironmental modification following permanent defoliation of Wyoming big sagebrush

Creator:: Reece, Patrick Eldon
Resource Type:: Masters Thesis

Biology and control of barb goatgrass (Aegilops triuncialis L.)

Creator:: Peters, Amy
Abstract:: This research examined the biology of barb goatgrass (Aegilops triuncialis L.) a weedy annual grass that is invading the rangelands of California. Germination and root growth characteristics of barb goatgrass were compared to soft chess (Bromis mollis L.), medusahead rye (Taeniatherum caput-medusae (L.) Nevski), slender wild oats (Avena barbata L.),...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

"The Island" Research Natural Area : a vegetation study with time and location comparisons

A comparative study of two land classification systems for use with remote sensor data

A comparison of four methods used in determining the diets of large herbivores

A taxonomic study of bitterbrush (Purshia tridentata (Pursh) DC.) in Oregon

An Investigation of soil, vegetation and mycorrhizal characteristics associated with native grass re-esablishment in crested wheatgrass seedings

Application of stream classification and historical land uses for managed riparian systems of Eastern Oregon

Assessment of a Douglas-fir/sheep silvopastoral system in western Oregon

Assessment of impacts of Canada geese on wheat production

Autecology of three perennial grasses relative to microenvironmental modification following permanent defoliation of Wyoming big sagebrush

Biology and control of barb goatgrass (Aegilops triuncialis L.)

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