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Book: Tomography of Soil-Water-Root Processes
Published by: Soil Science Society of America, American Society of Agronomy, and Crop Science Society of America

 

This chapter in TOMOGRAPHY OF SOIL-WATER-ROOT PROCESSES

  1.  p. 73-86
    SSSA Special Publication 36.
    Tomography of Soil-Water-Root Processes

    S. H. Anderson and J. W. Hopmans (ed.)

    ISBN: 978-0-89118-931-2

     

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doi:10.2136/sssaspecpub36.c7

Evaluation of Soil-Pore Continuity Using Geostatistical Analysis on Macroporosity in Serial Sections Obtained by Computed Tomography Scanning

  1. Mike C. J. Grevers and
  2. E. de Jong
  1. University of Saskatchewan, Saskatoon, Canada

Abstract

The spatial continuity of soil macroporosity in serial sections obtained by computed tomography (CT)-scanning of soil cores was analyzed by geostatistical analysis. The soil samples involved compacted soils and subsoiled soils. A total of 50 1-mm scans (serial sections) were taken from each soil core by a CT-scanner. The x-rays of the serial sections were analysed by an image analyzer. Conventional analysis of soil structure suggested greater soil macroporosity and greater continuity of soil macroporosity in the subsoiled soils. Image analysis of serial sections from CT-scans taken from the soil cores showed that the soil macroporosity in the subsoiled soils was considerably larger, but less variable than the macroporosity in the compacted soils. The soil macroporosity in the compacted soils was greatest just above the compacted soil layer. The geostatistical analysis of soil macroporosity indicated a greater degree of spatial continuity in the subsoiled soils, especially in the largest size class of macropores. Geostatistical analysis was a useful method for indicating spatial variability and for quantifying the apparent continuity of soil macroporosity.

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Copyright © 1994. Copyright © 1994 by the Soil Science Society of Agronomy, Inc., 5585 Guilford Rd., Madison, WI 53711 USA