The use of a comparative particle size distribution index for the numerical classification of soil parent materials: application to mollisols of the argentinian pampa |
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Authors: | R. Langohr C.O. Scoppa A.Van Wambeke |
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Affiliation: | 1. University of Ghent, Ghent Belgium;2. Instituto Nacional de Tecnologia Agricola, Buenos Aires Argentina |
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Abstract: | A method to estimate the magnitude of discontinuities or similarities in parent materials having equivalent mineralogical composition is proposed. It is based on a particle size distribution index which compares for two samples the weight percentages of all fractions taken between selected size limits.The indexes form a matrix and are used to construct a dendrogram which illustrates the clustering into groups. The calculations are carried out by computer using a Fortran programme.The technique was applied to a set of soil samples of Mollisols in the humid undulating pampa in Argentina and good agreement with field observations was obtained. |
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