Index Catalog // ScholarsArchive@OSU

Differential sensitivity of two common groundsel biotypes (Senecio vulgaris L.) to several s-triazine herbicides

Creator:: Radosevich, Steven R.
Abstract:: Studies were initiated to determine the response of two common groundsel biotypes (Senecio vulgaris L. ) to several s-triazine herbicides. Herbicides tested were: 2-chloro-4,6-bis(ethylamino)-striazine (simazine), 2-chloro-4-(ethylamino)-6-(isopropylamino)- s-triazine (atrazine) 2-(sec-butylamino)-4-(ethylamino)-6-methoxys- triazine (GS-14254), 2, 4-bis(isopropylamino)-6-methoxy-striazine (prometone), 2-(tert-butylamino)-4-(ethylamino)-6-methylthio- s-triazine (terbutryn), and 2, 4-bis(isopropylamino)-6- methylthio-s-triazine (prometryne). One biotype was much more susceptible than the...
Resource Type:: Dissertation
Full Text:: Science, Dr. S. C. Fang, Department of Agricul- tural Chemistry, and Dr. Larry Boersma for their guidance

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

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:: ), Arnold Appleby, Larry Burrill, Wayne King, Modesto Madrid, Helene Murray, Tan Siyuan, Dan Curtis, Deby

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:: indebted to J. Zasada and S. Child., who contributed many useful ideas and much help and inspiration, and R

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

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

Mechanisms of uptake and some factors influencing the toxicity of 2-chloro-2', 6'-diethyl-N-(methoxymethyl) acetanilide (alachlor) for selected plant species

Creator:: Groenwold, Bareld Egge, 1939-
Abstract:: A number of studies with ¹⁴C-labeled 2-chloro-2', 6'-diethyl- N-(methoxymethyl) acetanilide (alachlor) were conducted to obtain information about the mechanisms of uptake of this herbicide. In other studies, technical alachlor as well as the emulsifiable concentrate formulation of the chemical were used to investigate the effect of several factors on the...
Resource Type:: Dissertation
Full Text:: and Dr. Thomas C. Moore for their excellent suggestions in the writing of this manuscript. Dr. Larry

Expression and inheritance of tolerance to waterlogging stresses in wheat (Triticum aestivum L.)

Creator:: Boru, Getachew
Resource Type:: Dissertation
Full Text:: . Sincere thanks and appreciation are extended to my graduate committee Drs. Larry Boersma, Dal lice Mills

Ozone flux in Helianthus annuus (L.)

Creator:: Smith, Elaine D.
Abstract:: Sunflower (Helianthus annuus L., cv. NK894) seedlings, grown hydroponically, were exposed to ozone concentrations of 0.0, 0.1, 0.2, and 0.3 ppm at 60% RH, or 0.0 and 0.3 ppm at 30% and 90% RH, for 6 h/d, for four consecutive days, at ages 15 to 18 days from seeding. Plant...
Resource Type:: Masters Thesis
Full Text:: during the writing of this thesis. I also appreciate the efforts of Dr. Larry Boersma, Dr. Ralph

ScholarsArchive@OSU

Differential sensitivity of two common groundsel biotypes (Senecio vulgaris L.) to several s-triazine herbicides

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

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

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

Chloride fertilizer effects on stripe rust development in winter wheat

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

Mechanisms of uptake and some factors influencing the toxicity of 2-chloro-2', 6'-diethyl-N-(methoxymethyl) acetanilide (alachlor) for selected plant species

Expression and inheritance of tolerance to waterlogging stresses in wheat (Triticum aestivum L.)

Ozone flux in Helianthus annuus (L.)

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