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Filtering by: Creator Clay, Sharon A. Remove constraint Creator: Clay, Sharon A. Advisor Appleby, Arnold P. Remove constraint Advisor: Appleby, Arnold P. Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Effect of a pre-irrigation period on the activity of ethofumesate applied to dry soil

    Creator:
    McAuliffe, David
    Abstract:
    Applications of ethofumesate in Oregon have been observed from previous research and from commercial use to be less effective when applied to dry soils, even if subsequent precipitation occurred within a few days. Two field studies were established in the summer of 1979 using sweet corn (Zea mays L. 'Jubilee')...
    Resource Type:
    Masters Thesis
    Full Text:
    structure. Clays Clay Miner. 16:393-398. 18. Ostrowski, J. and A. Reisler. 1976. On the effect of place

  • Factors influencing the effectiveness of activated carbon used to protect newly-seeded grasses from herbicides

    Creator:
    Burr, Ronald J.
    Abstract:
    Previous research has shown that activated carbon is effective in inactivating certain herbicides applied as a preemergence treatment. Studies were conducted in the greenhouse to determine the influence of various factors on the ability of activated carbon to inactivate herbicides applied after carbon application. Field studies were conducted to determine...
    Resource Type:
    Masters Thesis
    Full Text:
    obtained on a clay loam soil: The influence of the rate and band width of activated carbon was determined

  • The persistence of five herbicides in Hawaiian soil

    Creator:
    Kitagawa, Yukio
    Abstract:
    The persistence of DCPA, trifluralin, diphenamid, diuron, and prometryne was studied in three soils which were located at the Kula, Poamoho, and Waimanalo Experiment Stations. The order of decreasing persistency was diuron, prometryne, trifluralin, DCPA, and diphenamid. Diuron and prometryne activities were recorded for at least six months and diuron...
    Resource Type:
    Masters Thesis
    Full Text:
    percentage of clay, organic matter, or both. Fang, Theisen, and Freed (18) found that there was a positive

  • Factors influencing metribuzin use in strip-planted wheat

    Creator:
    Zeghida, Ali
    Abstract:
    Equipment for strip-till planting is under development in wheat-fallow rotations in the Columbia Basin of Oregon. This involves the absence of tillage during the fallow season. At planting time, the strip-till planter creates a narrow band into which the wheat seed is placed. The area between the rows is undisturbed...
    Resource Type:
    Masters Thesis
    Full Text:
    between clay and organic matter for sites available for herbicide adsorption. This competition caused a

  • The reproduction and mode of spread of sago pondweed (Potamogeton pectinatus L.) in irrigation system

    Creator:
    Ogg, Alex G.
    Abstract:
    Nine experiments were conducted during 1964 and 1965 to study the methods of reproduction and mode of spread of sago pondweed (Potamogeton pectinatus) in irrigation systems. Frequent treatments of sago pondweed foliage with aromatic solvent greatly reduced the number of tubers in the substratum of an irrigation canal. However, complete...
    Resource Type:
    Masters Thesis
    Full Text:
    Eltopia Branch Canal was classified as a silty clay loam and had a pH of 8.4. The water temperature

  • Factors influencing the herbicidal activity and persistence of isomers of 1, 1-dimethyl-diisopropyl-indanyl ethyl ketone in soil

    Creator:
    Donaldson, Dean Robert
    Abstract:
    The purpose of this study was to evaluate the activity of Sindone (isomers of 1, 1-dimethyl-diisopropyl-indanyl ethyl ketone) under field conditions and to gain information regarding the rate of detoxification of Sindone in soil. A series of trials were established in sugar beet fields in California, Oregon, and Washington. Sindone...
    Resource Type:
    Masters Thesis
    Full Text:
    the rate of detoxi- fication of Sindone in soil. A series of trials were established in sugar beet

  • The lateral movement of cycloate as affected by three soil types and four methods of irrigation when applied to the soil by injection incorporation

    Creator:
    Stanger, Charles Earl, 1929-
    Abstract:
    Lateral diffusion of S-ethyl N-ethylthiocyclohexanecarbamate (cycloate)¹ is essential for satisfactory weed control with injection type incorporation in sugar beet (Beta vulgaris Linn.) production. Previous field experience with injection incorporation has indicated that sufficient lateral diffusion for satisfactory weed control has not occurred under all field conditions. Researchers who have been...
    Resource Type:
    Masters Thesis
    Full Text:
    of soil. The soil used in this study was a clay loam river bottom soil obtained from the East Farm

  • Factors affecting selective control of wild oat and downy brome in wheat by trifluralin

    Creator:
    Aldridge, Jack Clifton
    Abstract:
    Trifluralin (a, a, a - trifluoro -2, 6 -dinitro-N, N-dipropyl-ptoluidine) is effective in controlling downy brome (Bromus tectorum L.) and wild oat (Avena fatua L.) but does not severely affect the growth of wheat (Triticum aestivum L.). Studies were conducted using germination chamber and greenhouse facilities to investigate possible factors...
    Resource Type:
    Masters Thesis
    Full Text:
    Arnold P. 461ifeby Tr ifluralin (a, a, a - trifluoro -2, 6 -dinitro-N, N-dipropyl-p- toluidine) is

  • Persistence of prodiamine and norflurazon herbicides in soil and their activity on alfalfa rotational crops

    Creator:
    Fischer, Vernon F.
    Abstract:
    Norflurazon [4-chloro-5-(methylamino)-2(3-(trifluoromethyl) phenyl)- 3(2H)- pyridazinone] and prodiamine (N3, N3-di-n-propy1-2,4- dinitro-6-(trifluoromethyl)-m-phenylenediamine) are two herbicides being considered for weed control in alfalfa. Rotational crops following alfalfa may be sensitive to residues of these herbicides. Studies were conducted in Oregon and Washington to examine the soil persistence and activity of these herbicides on...
    Resource Type:
    Masters Thesis
    Full Text:
    , norflurazon residue was measured at 0.50 ug/g in a Bradson clay loam, but grain sorghum injury was 9

  • Influence of soil moisture on movement of terbacil in soil

    Creator:
    Vesecky, John Francis
    Abstract:
    Previous field research with terbacil (3-tert-butyl-5-chloro- 6-methyluracil) has shown that early fall applications to dry soil performed better than did late fall or early winter applications to wet soil. Field and greenhouse studies were conducted to determine the effect of soil moisture content at time of application and the effect...
    Resource Type:
    Masters Thesis
    Full Text:
    showed that 2,3,6-trichlorobenzoic acid (2,3,6-TBA) leached to greater depths in a clay loam soil at