Cation ratio of soil structural stability (CROSS)
Poster
Paper/Presentation Title | Cation ratio of soil structural stability (CROSS) |
---|---|
Presentation Type | Poster |
Authors | Marchuk, Alla G. (Author) and Rengasamy, Pichu (Author) |
Editors | Gilkes, Robert and Prakongkep, Nattaporn |
Journal or Proceedings Title | Proceedings 19th World Congress of Soil Science 2010 |
Journal Citation | 1, pp. 5981-5983 |
Number of Pages | 3 |
Year | 2010 |
Place of Publication | Melbourne, Australia |
ISBN | 9781618391025 |
Web Address (URL) of Paper | http://www.iuss.org/19th%20WCSS/Symposium/pdf/1194.pdf |
Conference/Event | 19th World Congress of Soil Science (WCSS 2010): Soil Solutions for a Changing World |
World Congress of Soil Science | |
Event Details | 19th World Congress of Soil Science (WCSS 2010): Soil Solutions for a Changing World Event Date 01 to end of 06 Aug 2010 Event Location Brisbane, Australia |
Event Details | World Congress of Soil Science WCSS |
Abstract | Sodium salts tend to dominate salt-affected soils and groundwater in Australia and therefore, sodium adsorption ratio (SAR) is being used to parameterize soil sodicity and the effects of sodium on soil structure. Recent reports, however, now draw attention to elevated concentrations of potassium and/or magnesium in some soils naturally and also as a result of increasing irrigation with recycled water in Australia. Therefore, there is a need to derive and define a new ratio of these cations in place of SAR, which will indicate the effects of Na and K on clay dispersion and Ca and Mg on flocculation. Rengasamy and Sumner (1998) derived the flocculation power of these cations and on this basis Rengasamy (unpublished) defined the cation ratio of soil structural stability (CROSS). This paper gives the results of an experiment conducted on ten soil samples on hydraulic conductivity using a number of artificially prepared irrigation waters, containing different proportions of the cations Ca, Mg, K and Na. The relative changes in hydraulic conductivity of these soils reflected the flocculating power of the cations, compared to the control treatment of using CaCl2 solution. Clay dispersion was found to be highly correlated to CROSS rather than to SAR. |
Keywords | sodicity; soil structure; irrigation; potassium; cations |
ANZSRC Field of Research 2020 | 410604. Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) |
300201. Agricultural hydrology | |
400513. Water resources engineering | |
Public Notes | © 2010 by the Australian Society of Soil Science Incorporated. This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source. |
Byline Affiliations | University of Adelaide |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2982/cation-ratio-of-soil-structural-stability-cross
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