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Filtering by: Alternative title ssim WRRI 17 Remove constraint Alternative title ssim: WRRI 17 Degree Field Soil Science Remove constraint Degree Field: Soil Science Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Effects of clay-water interactions on water retention in porous media

    Creator:
    Lenhard, Robert J. (Robert James)
    Abstract:
    Capillary pressure-saturation data obtained for unconsolidated porous media with different liquids are examined to investigate the effects of clay-liquid interactions on liquid retention. Liquid retention functions are assumed to reflect the effective pore-size distributions. The hydraulic variables, capillary pressure and saturation, are transformed to account for changes in liquid retention...
    Resource Type:
    Dissertation
    Full Text:
    Data 6 7 8 9 14 17 19 20 21 23 26 29 37 58 61 62 64 65 75 81 102 104 109 110 114

  • Relationships of clay mineralogy to landscape stability in Western Oregon

    Creator:
    Taskey, Ronald D. (Ronald David), 1944-
    Abstract:
    Soil erosion by mass wasting is the major problem on forest lands of the Pacific Northwest, The clay fractions of soils from a large number of sites in Oregon's Western Cascades were characterized in order to determine the relationships of various clay materials to mass movements. Each site was either...
    Resource Type:
    Dissertation
    Full Text:
    failure. Site MS-2 (right) XRD patterns of material similar to that underlying MS-1 45 17. DTA pattern

  • Soil solution chemistry, profile development, and mineral authigenesis in several western Oregon soils

    Creator:
    Glasmann, Joseph Reed
    Abstract:
    Clay mineral genesis was studied in soils representative of several different geomorphic surfaces in western Oregon, ranging in age from Pliocene-early Pleistocene to late Pleistocene. Soil solution studies, clay mineralogy, and soil raicromorphology were employed to provide evidence of clay mineral synthesis and interpret soil genesis. Soils at each study...
    Resource Type:
    Dissertation
    Full Text:
    waters from soils 17 in western Oregon. 2 pH 4 SiO 4 and pH of equilibrated soil solutions from sites