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Description: Computer assisted Tomography (CAT) offers considerable potential for reliable and nondestructive in-situ characterization of macropores occurring in agricultural soils. Several researchers have used CAT techniques for characterizing soil macropores of small undisturbed soil cores. However, there is still a need to develop comprehensive algorithms to automate the analysis and interpretation of macropore geometry directly from CAT scan data. Four undisturbed soil columns (800 mm long x 77 mm diameter) were extracted from a loamy sand field in central Canada and scanned for the visualization and characterization of their interconnecting macropore structure. A total of 240 scans of 3-mm depth were taken for each column. After conversion of the raw CAT scan data into density matrices, two- and three-dimensional soil density reconstructions were generated. With the elaboration of numerous computer programs in the PV-WAVE language, this analysis gives a detailed representation of the spatial variations of the macropore structure and heterogeneity of soil.

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Citation: J. Perret. S.O. Prasher. A. Kantzas and C. Langford 1997. 3-D VIS ALIZAT10N OF SOIL MACROPOROSITY SING X-RAY CAT SCANNING. Canadian Agricultural Engineering 39(4):249-261.
Volume: 39
Issue: 4
Pages -
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Date: 1997
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Type: Text.Article
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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