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Numerical classification of range vegetation and statistical analysis of its ecology

Creator:: Pyott, William Tucker, 1936-
Abstract:: The purpose of the research was to computerize mathematical procedures for the analysis of range vegetation and environmental data. The specific objectives were as follows: 1. to develop and apply computer techniques to the classification of vegetation in order to provide a phytosociological framework within which to investigate the ecology...
Resource Type:: Dissertation
Full Text:: Vegetation Classification 7 The Dual Role of Plant Species 11 Determination of Vegetation Units 12

A study of seasonal variation of the composition of forage plants of southeastern Oregon

Creator:: Jensen, Horace
Resource Type:: Masters Thesis
Full Text:: A study of seasonal variation of the composition of forage

The seasonal yield, quality, and utilization of Trifolium subterraneum in mixture with festuca arundinacea and Lolium perenne in western Oregon

Creator:: Sanders, Kenneth D. (Kenneth Dwayne), 1940-
Abstract:: In 1959, a large scale grazing study in western Oregon was initiated to compare the value of perennial ryegrass (Lolium perenne L.) with subclover (Trifolium subterraneum L.) and tall fescue (Festuca arundinacea Schreb.) with subclover, and to evaluate common use grazing on them. The present investigation was undertaken to determine...
Resource Type:: Masters Thesis
Full Text:: grasses in April but after June it was higher. With an abundance of forage available, cattle and sheep

Evaluation of dry-weight-rank and microscopic point techniques for seasonal botanical analysis of two pasture mixtures

Creator:: Bauer, Welby
Abstract:: This study was undertaken to evaluate the dry-weight-rank and microscopic point methods for determining botanical composition on perennial ryegrass (Lolium perenne L.) - subclover (Trifolium subterraneum L.) and tall fescue (Festuca arundinacea Schreb.) - subclover pasture mixtures throughout a grazing season. Botanical composition was determined on a monthly basis from...
Resource Type:: Masters Thesis
Full Text:: weight prediction equations for plant species in masticated forage samples of known species weights. The

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

Creator:: Turner, Robert Bruce
Abstract:: 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. )...
Resource Type:: Dissertation
Full Text:: , much of this area now-supports cheatgrass (Bromus tectorum) as the main forage plant. Many of these

A survey and analysis of the range forage inventory methods

Creator:: Chohlis, Gus John
Resource Type:: Masters Thesis
Full Text:: measurements they obtained the approximate productivity of the various forage plant assoc±ations of the

Forage utilization estimates in relation to ecological units in the Wallowa mountains of northeastern Oregon

Creator:: Johnson, Walter Van-Gale
Resource Type:: Masters Thesis
Full Text:: condition classes. He proposed that a key forage plant would be used as a basis for estimating use, but

Forage production on range sites in east central Malheur County, Oregon

Creator:: Bunch, Thomas R
Abstract:: Objectives of this investigation were two-fold: (l) to determine crested wheatgrass production on selected range sites and (2) to evaluate present and potential production on public and private lands in the study area. Field studies were carried out in 1953 and 1964 near Jordan Valley, Malheur County, Oregon, on the...
Resource Type:: Masters Thesis
Full Text:: . in Range Managernent (Narne) Date the sis is pre sented (Major) Title FORAGE PRODUCTION ON RANGE

Evaluation of species composition by four methods on two perennial grass pastures (Festuca arundinacae Schreb. and Lolium perenne L.) grazed lightly and heavily in western Oregon

Creator:: Pessot Zorich, Rafael
Abstract:: The present study was undertaken to evaluate the seasonal botanical composition of two grass pastures, tall fescue (Festuca arundinacea Schreb.) and perennial ryegrass (Lolium perenne L.). Botanical composition was determined by four methods: dry-weight-rank, weight-estimate, hand separation, and the constituent differential, with cattle and sheep grazing at two intensities. The...
Resource Type:: Masters Thesis
Full Text:: Forage 6 Livestock Use of Pastures 9 LITERATURE REVIEW 11 METHODS 16 Sampling Procedure 16

A comparative study of selected methods for sampling vegetation

Creator:: Conrad, C. Eugene
Resource Type:: Masters Thesis
Full Text:: plant cover, ccznpoßitlon, d.eneity and degree of forage use. It is described as a procedure for

ScholarsArchive@OSU

Numerical classification of range vegetation and statistical analysis of its ecology

A study of seasonal variation of the composition of forage plants of southeastern Oregon

The seasonal yield, quality, and utilization of Trifolium subterraneum in mixture with festuca arundinacea and Lolium perenne in western Oregon

Evaluation of dry-weight-rank and microscopic point techniques for seasonal botanical analysis of two pasture mixtures

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

A survey and analysis of the range forage inventory methods

Forage utilization estimates in relation to ecological units in the Wallowa mountains of northeastern Oregon

Forage production on range sites in east central Malheur County, Oregon

Evaluation of species composition by four methods on two perennial grass pastures (Festuca arundinacae Schreb. and Lolium perenne L.) grazed lightly and heavily in western Oregon

A comparative study of selected methods for sampling vegetation

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