An examination of the end-over-end shaking technique for measuring soil dispersion
Article
Article Title | An examination of the end-over-end shaking technique for measuring soil dispersion |
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ERA Journal ID | 5248 |
Article Category | Article |
Authors | So, H. B. (Author), Cook, G. D. (Author) and Raine, S. R. (Author) |
Journal Title | Australian Journal of Soil Research |
Journal Citation | 35 (1), pp. 31-39 |
Number of Pages | 9 |
Year | 1997 |
Publisher | CSIRO Publishing |
Place of Publication | Australia |
Digital Object Identifier (DOI) | https://doi.org/10.1071/S96062 |
Web Address (URL) | http://www.publish.csiro.au/paper/S96062.htm |
Abstract | The end-over-end shaking technique has been widely used to provide a measure of soil dispersibility. However, results are dependent on the specific methodology employed. This paper investigates the effect of various physical parameters on the dispersion produced using an end-over-end shaking technique. Significant (P < 0·05) increases in the percentages of clay (D2) and silt+clay (D20) particles dispersed as a proportion of the total soil weight were observed with increasing period of shaking, suspension concentration, container size, and air-gap above the suspension. However, differences due to suspension temperature and soil texture were either relatively minor or insignificant (P > 0·05). To enable better comparison of results from different workers, the following methodology for end-over-end shaking studies is proposed as a standard. The soil sample should be air-dried and crushed to pass through a 2-mm sieve. The air-dried equivalent of 50 g oven-dried soil should then be immersed in 1 L double-deionised water at 20°C within a 1·425-L cylinder (70 mm internal diameter) and shaken end-over-end at 20 rpm for 30 min before measuring the amount of dispersed <2 and <20 µm material produced. The amount of dispersed material should be expressed as a proportion of the total soil material. |
Keywords | aggregate stability; disaggregation; structure |
ANZSRC Field of Research 2020 | 410605. Soil physics |
370511. Structural geology and tectonics | |
300202. Agricultural land management | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | University of Queensland |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q059x/an-examination-of-the-end-over-end-shaking-technique-for-measuring-soil-dispersion
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