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Impedance Factor for Chloride Diffusion in Soil as Affected by Bulk Density and Water Content
Author(s) -
Bhadoria P. B. S.,
Kaselowsky J.,
Claassen N.,
Jungk A.
Publication year - 1991
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19911540114
Subject(s) - bulk density , water content , gravimetric analysis , diffusion , analytical chemistry (journal) , content (measure theory) , chemistry , soil science , materials science , soil water , thermodynamics , environmental chemistry , geotechnical engineering , geology , mathematics , physics , organic chemistry , mathematical analysis
The influence of soil bulk density and water content on the impedance factor (f) was studied by measuring bulk diffusion of chloride from one soil block to another differing in Cl − ‐concentration. An increase in bulk density from 1.38 to 1.76 g cm −3 at a constant gravimetric moisture content of 7% decreased f by a factor of 3, at 10% to 12% there was nearly no effect on f, while at higher soil moistures of 16% to 20%, f increased almost linearly with increasing bulk density. With increasing soil volumetric water content, (θ), f increased linearly at all soil bulk densities. At the same θ, the impedance factor decreased with increasing soil bulk density. The relationship between θ and f as established by Barraclough and Tinker (1981) agrees well with the results obtained here for bulk densities of 1.38 and 1.56 g cm −3 and water contents higher than 18% (v/v). However, at lower values of θ, measured f values were higher than predicted by these authors. On the other hand, f values for a bulk density of 1.76 g cm −1 at all water contents were clearly below the values of these authors.