Index Catalog // ScholarsArchive@OSU

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:: in Central Oregon AN ABSTRACT OF THE THESIS OF Milda R. Vaitkus for the degree of Master of

Effects of environmental conditions on germination and early seedling development in Agropyron spicatum

Creator:: Evenden, Angela G.
Abstract:: This research evaluated the germination and early seedling development response of two sources of bluebunch wheatgrass (Agropyron spicatum) to a wide range of environmental conditions. Seeds collected near John Day, Oregon and Secar seed obtained from the Soil Conservation Service were used in the investigations. Evaluation of the germination response...
Resource Type:: Masters Thesis
Full Text:: when I was unable to be there. In addition, thanks go to Milda Vaitkus, Carolyn Bohn, Karen Holdsworth

Ecological relationships among feral horses, cattle, and pronghorn in southeastern Oregon

Creator:: McInnis, Michael Lindsay
Resource Type:: Dissertation
Full Text:: people of Corvallis: Robert and Clarice MacVicar who opened their door to me, Milda Vaitkus who patiently

"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
Full Text:: interest in this study, to Richard R. Halse who along with other helpful input has provided his plant

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Creator:: Alejandro-Castro, Mabel
Abstract:: The ability of controlled livestock grazing, in combination with seeding of palatable forages, to reduce understory competition and enhance conifer establishment, was evaluated during 1985 and 1986, on two adjacent sites in southwestern Oregon. In 1984, Site 1 was clearcut and broadcast burned to remove slash, and Site 2 was...
Resource Type:: Masters Thesis
Full Text:: Milda Vaitkus for caring so much. I especially thank Becky Brown, for her technical assistance in the

Understory vegetation response and nitrogen cycling following cutting of western juniper

Creator:: Bates, Jonathan D.
Abstract:: Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
Resource Type:: Dissertation
Full Text:: Profess r, representing Rangeland Resources orCo Major PrIss, r presenting Rangeland Resources Head of

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Creator:: Rose, Jeffrey A.
Abstract:: This research assessed the effect of western juniper (Junlperus occldentalls) removal on understory plant production and cover and ponderosa pine (Pinus ponderosa) growth and plant water status. A complete randomized block design, with four blocks and four treatments was established in the summer of 1984 near Prineville, Oregon. The four...
Resource Type:: Masters Thesis
Full Text:: asked little in return. Special thanks to my friends, Hilda Vaitkus, Paul Doescher, and Gregg Riegel

Modeling riparian zone processes : biomass production and grazing

Creator:: Korpela, Edwin J.
Abstract:: Seasonal trends in forage production and environmental parameters for five plant community types within a northeastern Oregon riparian zone were described and modeled using correlation and path analysis. Wet meadows produced the greatest amount of herbage biomass, followed by moist bluegrass meadows, gravel bars, forests and dry bluegrass meadows. Trends...
Resource Type:: Dissertation
Full Text:: which I would especially like to single out include; Boone Kauffman, Milda Vaitkus, Ray Jaindl, Patti

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

Creator:: Riegel, Gregg M.
Abstract:: The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
Resource Type:: Dissertation
Full Text:: program. Sincere appreciation is extended to Jeff Rose, Milda Vaitkus, Dr. Dennis Sheehy, and Chris

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

Creator:: Washington, Joseph P.
Resource Type:: Masters Thesis
Full Text:: after western juniper control in central Oregon (Vaitkus and Eddleman, 1987). Annual grasses were

ScholarsArchive@OSU

Effect of western juniper on understory herbage production in Central Oregon

Effects of environmental conditions on germination and early seedling development in Agropyron spicatum

Ecological relationships among feral horses, cattle, and pronghorn in southeastern Oregon

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

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Understory vegetation response and nitrogen cycling following cutting of western juniper

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Modeling riparian zone processes : biomass production and grazing

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

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

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