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An evaluation of field methods of disease assessment in wheat (Triticum aestivum) for stripe rust (Puccinia striiformis)

Creator:: Mork, Colleen C.
Abstract:: The need to identify a simple but accurate method of stripe rust assessment that best predicts host response prompted this investigation. The study was divided into two plot types, one protected with the fungicide Bayleton and the other unprotected. Ten winter wheat cultivars were used and evaluated. Grain yield, test...
Resource Type:: Masters Thesis
Full Text:: and write-up of this thesis. In addition, I would like to thank Dr. Larry L. Boersma for being a

Evaluating methods for measuring soil-CO₂-efflux in artificial, controlled and natural ecosystems

Creator:: Nay, Stephan Mark
Resource Type:: Masters Thesis

Chloride fertilizer effects on stripe rust development in winter wheat

Creator:: Scheyer, Joyce Mack
Abstract:: Field and growth chamber experiments were conducted to determine chloride effects on the progress of stripe rust disease caused by Puccinia striiformis West., and to investigate turgor potential as the mechanism of the chloride effect. Seven winter wheat (Triticum aestivum) cultivars were grown in the field in 1982 and 1983...
Resource Type:: Masters Thesis
Full Text:: Drs. Robert Powelson and Larry Boersma for their time and counsel as graduate committee members, To

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Creator:: Schisler, David Albert
Abstract:: Fusarium spp. frequent conifer nursery soils yet are rarely recovered from coniferous forest soils. Experiments were performed to determine what influence humic-rich organic amendments and volatiles from soil, ectomycorrhizal fungi and ectomycorrhizae have on the populations of several physiologic and taxonomic microbial groups potentially related to this phenomenon. A comparative...
Resource Type:: Dissertation
Full Text:: priorities were in question. Committee members Dr. Peter Bottomley and Dr. Larry Boersma are appreciated

Effects of microsite alteration on soil climate, nitrogen mineralization, and establishment of Picea Glauca x Engelmannii seedlings in the sub-boreal spruce zone of west-central British Columbia

Creator:: Macadam, Anne M.
Abstract:: Site preparation treatments are often used prior to the planting of clearcut forest lands to improve planter access and to increase the number and quality of planting spots. Most mechanical site preparation treatments alter the configuration and material composition of surface soil materials, and can have marked effects on soil...
Resource Type:: Masters Thesis
Full Text:: project. L. Boersma and G. Jo lliff graciously consented to serve on my committee on very short notice

Estimated plant water use and crop coefficients for drip-irrigated hybrid polars

Creator:: Gochis, David J.
Abstract:: Estimations of plant water use can provide great assistance to growers, irrigators, engineers and water resource planners. This is especially true concerning the introduction of a new crop into irrigated agriculture. Growing hybrid poplar trees for wood chip stock and veneer production under agronomic practices is currently being explored as...
Resource Type:: Masters Thesis
Full Text:: committee Dr. Larry Boersma and Dr. Marshall English for their critical review and insightful input

Evaluation of allelopathy as a mechanism by which buckwheat suppresses Canada thistle and its mycorrhizae

Creator:: Eskelsen, Steven R.
Abstract:: Experiments were conducted to determine if allelopathy is a mechanism by which buckwheat interferes with a) the growth of Canada thistle and/or b) mycorrhizae colonization in Canada thistle roots. In a competition experiment, buckwheat plant biomass was only affected by the intraspecific competition from other buckwheat plants and not by...
Resource Type:: Dissertation
Full Text:: and Larry Boersma for also serving on my committee. TABLE OF CONTENTS CHAPTER 1. INTRODUCnON

Temperature prediction using energy budget techniques on small mountain streams

Creator:: Brown, George Wallace, 1939-
Abstract:: This study is part of the Alsea Basin Logging-Aquatic Resources Study research program. It was initiated to determine the applicability of energy budget theory to stream temperature prediction on small forested streams. The study was also designed to evaluate the energy budget technique as a tool in the management of...
Resource Type:: Dissertation

Effects of tillage systems on nitrate-nitrogen accumulation and soil structure

Creator:: Avcin, Abdulkadir
Abstract:: Effects of different tillage systems on nitrate-nitrogen accumulation in a 120 cm profile and on soil structure in the top 30 cm of the profile were studied under a fallow-wheat rotation. Treatment effects on nitrate-nitrogen, soil moisture and soil aggregation were measured. Fallow tillage treatments consisting of bare fallow, stubble-mulch...
Resource Type:: Masters Thesis
Full Text:: . Mosley and Dr. L. Boersma for serving on my graduate committee. I am finally grateful to the Government

Effect of two methylcarbamates on the toxiciity of isopropyl m-chlorocarbanilate (chlorpropham) to safflower (Carthamus tinctorius L.) and common buckwheat (Fagopyrum esculentum Moench.)

Creator:: Kirkland, Kenneth
Abstract:: Addition of the methylcarbamate compounds p-chlorophenyl N-methylcarbamate (PPG-124) and 1-naphthyl N-methylcarbamate (carbaryl) to various herbicides has resulted in reduced rates of degradation. Carbaryl affects the degradation of certain herbicides in both plants and soils while PPG-124 has only been demonstrated to affect degradation in soils. Both these materials are effective...
Resource Type:: Masters Thesis
Full Text:: manuscript. To Dr. Larry Boersma for serving on my graduate advisory committee. To Dr. Warren Zick for

ScholarsArchive@OSU

An evaluation of field methods of disease assessment in wheat (Triticum aestivum) for stripe rust (Puccinia striiformis)

Evaluating methods for measuring soil-CO₂-efflux in artificial, controlled and natural ecosystems

Chloride fertilizer effects on stripe rust development in winter wheat

Microbial analysis of coniferous forest and nursery soils : effects of ectomycorrhizae, volatiles, and humic-rich organic substrates

Effects of microsite alteration on soil climate, nitrogen mineralization, and establishment of Picea Glauca x Engelmannii seedlings in the sub-boreal spruce zone of west-central British Columbia

Estimated plant water use and crop coefficients for drip-irrigated hybrid polars

Evaluation of allelopathy as a mechanism by which buckwheat suppresses Canada thistle and its mycorrhizae

Temperature prediction using energy budget techniques on small mountain streams

Effects of tillage systems on nitrate-nitrogen accumulation and soil structure

Effect of two methylcarbamates on the toxiciity of isopropyl m-chlorocarbanilate (chlorpropham) to safflower (Carthamus tinctorius L.) and common buckwheat (Fagopyrum esculentum Moench.)

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