Index of soil aggregates stability as linear function value of transition matrix elements |
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Authors: | Jerzy Niewczas Barbara Witkowska-Walczak |
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Institution: | Polish Academy of Sciences, Institute of Agrophysics, Do
wiadczalna 4, 20-290, Lublin 27, P.O. Box 201, Poland |
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Abstract: | The paper presents a new index which is an innovative tool for the analysis of soil aggregates stability. The soil aggregates stability index (ASI) is based on a linear function value of transition matrix elements with coefficients being properly chosen weights. Each element of the transition matrix is a frequency (empirical probability) of aggregates transition from one class of size to another or within the same class. The proposed weights give an ASI value range from 1 to 32 and are thus formulated: a higher ASI value corresponds to a higher aggregates stability. The usefulness of the proposed index is illustrated in the case three soils (Haplic Phaeozem, Mollic Gleysol and Orthic Rendzina) for which aggregate water stability was determined by three different methods. |
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Keywords: | Soil aggregation Stability index Transition matrix Weights |
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