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Effect of western juniper on understory herbage production in Central Oregon

Creator:: Vaitkus, Milda R.
Abstract:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory production and composition. As trees increase in size and density, understory production is reduced and composition changes. This study was designed to identify the relationship between production and composition of understory vegetation and various tree canopy sizes of...
Resource Type:: Masters Thesis
Full Text:: Privacy 1 Dean of Gra ate Schoo4 Date Thesis is presented February 18, 1986 ACKNOWLEDGEMENTS I

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

Creator:: Washington, Joseph P.
Resource Type:: Masters Thesis
Full Text:: , Department of angeland Resources Dean of Gra te School I understand that my thesis will become part of

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

Creator:: Purrington, Teal Mackenzie
Abstract:: Water potential, leaf conductance, growth, nitrogen content, and seedling survival of Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis) following defoliation of the herbaceous understory were assessed during two growing seasons. Precipitation was 107% and 63% of the long-term mean (283 mm) in 1989 and 1990, respectively, which presented an opportunity...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Dean of Gradu School (1 1 Date Thesis is Presented: January 29, 1992 Typed By

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

Creator:: Johnson, Dustin D.
Abstract:: Since European American settlement of the Intermountain Region, dramatic changes in vegetation composition and structure have occurred in the sagebrush steppe ecosystem. Western juniper (Juniperus occidentalis spp. occidentalis Vasek), although indigenous to the Intermountain Region, has increased since the late 1800s. Considerable work has been done documenting juniper woodland expansion...
Resource Type:: Masters Thesis
Full Text:: Dean of the Rangeland Resources 3o I understand that my thesis will become part of the permanent

Influence of spring crested wheatgrass production on intake of grazing steers

Creator:: Handl, William Paul
Abstract:: Research was initiated at the Squaw Butte Experimental Range in southeastern Oregon to study the influence of crested wheatgrass (Agropyron desertorum (Fisch.) Schult. ) herbage availability on relative dry matter intake (DMI) of yearling steers. Herbage dry matter production on an 18 ha range and daily fecal production of yearling...
Resource Type:: Masters Thesis
Full Text:: Program Redacted for Privacy Dean of Graduate School Date thesis is presented 7 iii,(t l -/ /) Typed by

Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.)

Creator:: Kramer, Susanne
Abstract:: Whole tree excavation of 41 western juniper (Juniperus occidentalis Hook.), ranging in age from 2 to 34 years old, was used to assess the development and structure of root systems, to determine biomass allocation patterns, and to develop mathematical relationships for estimating biomass and root system dimensions in seedling and...
Resource Type:: Masters Thesis
Full Text:: Head of departtnt oyRangeland Resources Redacted for privacy Dean of Gra6te Scho Date thesis is

Seasonal response of bitterbrush to burning and clipping in eastern Oregon

Creator:: Clark, Robert G.
Abstract:: Bitterbrush [Purshia tridentata (Pursh) DC] plants were burned or clipped, fall and spring, under different soil moisture conditions on two sites in east-central Oregon. Treatments, on plants of an erect growth form on the Juniperus/Artemisia-Purshia site resulted in 38% of the fall-clipped and 40% of the spring-clipped plants sprouting. None...
Resource Type:: Masters Thesis
Full Text:: ReOurces Redacted for Privacy He d, Department Di° f Animal Science Redacted for Privacy Dean of

The effects of vegetation type and grazing system on the performance, diet and intake of yearling cattle

Creator:: Holechek, Jerry Lee
Resource Type:: Dissertation
Full Text:: , Rangeland Resorces P'rogram Dean of Graduate Schoo Date this is presented Typed by Margi Woiski for Jerry

Understory response to tree harvesting in pinyon-juniper woodlands

Creator:: Everett, Richard L.
Abstract:: Understory species associations and their association with tree species were examined on three intensively studied stands. We studied the chronosequence of understory species associated with different aged singleleaf pinyon (Pinus monophylla Torr. and Frem.) trees. Mid- to late pinyon-juniper understory succession was found to be more spatial than floristic in...
Resource Type:: Dissertation
Full Text:: Redacted for privacy Dean of chool Date thesis is presented May 23, 1984 Typed by Miss Lace Lichen for

Responses of vegetation and sheep to three grazing pressures

Creator:: Thetford, Frank Oren
Abstract:: A study was conducted over a two year period, 1973 through 1974, on perennial ryegrass-subclover pastures with stocking rates of 7.4 (moderate), 9. 9 (heavy), and 12.4 (overstocked) ewes per hectare to establish guidelines on stocking intensity for dryland improved pastures in western Oregon. Climatic conditions varied annually and caused...
Resource Type:: Dissertation
Full Text:: Redacted for Privacy Dean of GradAte School Date thesis is presented October 9, 1975 Typed by Mary Jo

ScholarsArchive@OSU

Effect of western juniper on understory herbage production in Central Oregon

Re-establishment of native perennial bunchgrasses in juniper/medusahead rangelands

Response of Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis) to defoliation of understory grasses and drought

The influence of environmental attributes on temporal and structural dynamics of western juniper woodland development and associated fuel loading characteristics

Influence of spring crested wheatgrass production on intake of grazing steers

Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.)

Seasonal response of bitterbrush to burning and clipping in eastern Oregon

The effects of vegetation type and grazing system on the performance, diet and intake of yearling cattle

Understory response to tree harvesting in pinyon-juniper woodlands

Responses of vegetation and sheep to three grazing pressures

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