Effect of ionic strength and sodium adsorption ratio on the flocculation/dispersion of two surface soils from eastern Arkansas

Mohamed S. Alhammadi, David M. Miller

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Poor tilth and, often, a surface crust characterize eastern Arkansas soils. Such soils have very low water infiltration and high water runoff rate leading to increase turbidity in rivers and soil erosion. Sharkey clay and Desha silt loam soils from Delta region of eastern Arkansas were used to find the effect of sodium adsorption ratio (SAR) and ionic strength (IS) on the dispersion/flocculation behaviors of the soils. Percent light transmissions at a wavelength of 530 nm were related to the concentration of clay in suspension. Each soil was equilibrated with a series of solutions having different IS and containing Na and Ca in various proportions. At different IS and SAR, the two soils exhibited different behaviors. Clay dispersibility was a more sensitive function of SAR at low IS than at high IS.

    Original languageEnglish
    Pages (from-to)960-967
    Number of pages8
    JournalSoil Science
    Volume171
    Issue number12
    DOIs
    Publication statusPublished - Dec 2006

    Keywords

    • Arkansas's Delta
    • Clay's behavior
    • Critical flocculation concentration

    ASJC Scopus subject areas

    • Soil Science

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