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Filtering by: Subject Soils -- Herbicide movement Remove constraint Subject: Soils -- Herbicide movement Academic Affiliation Soil Science Remove constraint Academic Affiliation: Soil Science

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  • Interaction of selected herbicides with soil constituents

    Creator:
    El-Madhun, Yousef Abdel Wahab
    Abstract:
    The behavior of six herbicides in soil was studied under controlled laboratory conditions. Sorption of bromacil, chiorotoluron and diuron was assessed by the batch equilibration procedure over a broad range of aqueous phase sorbate concentration. Linear equilibrium sorption constants (K[subscript p]) were slightly higher at 4° C than at 25°...
    Resource Type:
    Dissertation
    Full Text:
    . Temperature affected degradation more than did soil type or initial herbicide concentration. The degradation

  • Simulation and field validation of heat and water flow during soil freezing and thawing

    Creator:
    Pikul, Joseph Lawrence
    Abstract:
    Freeze/thaw cycles are numerous in agricultural soils of the Pacific Northwest. Potential loss of soil by erosion is high whenever a soil thaws from the surface creating a saturated soil overlying an impermeable frozen layer. Field studies were conducted to investigate the effect of surface residue on soil freezing. Residue...
    Resource Type:
    Dissertation
    Full Text:
    cycles Soil frost and heat flux during extended freezing weather Evaporation and water movement during