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This article in SSSAJ

  1. Vol. 43 No. 6, p. 1251-1252
     
    Received: Dec 14, 1978
    Published: Nov, 1979


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doi:10.2136/sssaj1979.03615995004300060041x

Influence of a Compact Zone on Solute Transport During Infiltration of Water1

  1. G. S. Hira and
  2. N. T. Singh2

Abstract

Abstract

In most soils, continuous plowing results in the formation of a compact zone below the plowing depth. Laboratory studies were conducted to examine the effect of such a zone on the displacement of chloride (Cl-) during infiltration of water. A compact zone of 4- or 8-cm thickness of 1.62 g/cm3 or 1.80 g/cm3 bulk density was created at a depth of 8 cm in soil columns. A surface-applied slug of calcium chloride was leached with 4 or 6 cm of distilled water. The presence of a compact zone in the soil profile pushed the Cl- peak deeper, dispersed the ions in a narrower region, and increased the peak Cl- concentration. Increasing bulk density and thickness of a compact zone increased the depth of the peak Cl- concentration.

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