An examination of the end-over-end shaking technique for measuring soil dispersion

So, H. B. and Cook, G. D. and Raine, S. R. (1997) An examination of the end-over-end shaking technique for measuring soil dispersion. Australian Journal of Soil Research, 35 (1). pp. 31-39. ISSN 0004-9573

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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 30 Nov 2007 11:47
Last Modified: 27 Aug 2013 04:50
Uncontrolled Keywords: aggregate stability; disaggregation; structure
Fields of Research : 05 Environmental Sciences > 0503 Soil Sciences > 050305 Soil Physics
04 Earth Sciences > 0403 Geology > 040312 Structural Geology
07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070101 Agricultural Land Management
Socio-Economic Objective: D Environment > 96 Environment > 9614 Soils > 961499 Soils not elsewhere classified
Identification Number or DOI: 10.1071/S96062
URI: http://eprints.usq.edu.au/id/eprint/13502

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