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This article in SSSAJ

  1. Vol. 41 No. 6, p. 1212-1214
     
    Received: Apr 25, 1977
    Accepted: Aug 16, 1977


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doi:10.2136/sssaj1977.03615995004100060044x

The Lithoplinthic Horizon, a Diagnostic Horizon for Soil Taxonomy1

  1. Guy D. Smith,
  2. Pedro Brito A. and
  3. Oswaldo Luque2

Abstract

Abstract

A new diagnostic horizon, the lithoplinthic horizon, is proposed for an indurated ironstone that contains many irregular, tubular, channels filled with fine earth, that conduct water and permit plant roots to reach underlying horizons. It is hard rock for many engineering interpretations and soil for interpretations for plant growth. It is proposed that, if there are no overlying diagnostic horizons other than an ochric epipedon, the soils should be classified as lithoplinthic subgroups of Orthents. Use of family classes of particle size and depth is proposed, but not of mineralogy.

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