Evaluating dispersive potential to identify the threshold electrolyte concentration in non-dispersive soils
Article
Article Title | Evaluating dispersive potential to identify the threshold electrolyte concentration in non-dispersive soils |
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ERA Journal ID | 5248 |
Article Category | Article |
Authors | Dang, A. (Author), Bennett, J. (Author), Marchuk, A. (Author), Biggs, A. (Author) and Raine, S. (Author) |
Journal Title | Soil Research |
Journal Citation | 56 (6), pp. 549-559 |
Number of Pages | 11 |
Year | 2018 |
Publisher | CSIRO Publishing |
Place of Publication | Australia |
ISSN | 0004-9573 |
1446-568X | |
1838-675X | |
1838-6768 | |
Digital Object Identifier (DOI) | https://doi.org/10.1071/SR17304 |
Web Address (URL) | https://www.publish.csiro.au/sr/SR17304 |
Abstract | Use of non-traditional and marginal quality saline sodic water will increase in water limited environments and methods to assess use suitability are required. The threshold electrolyte concentration (CTH) defines the soil solution concentration, for a given soil solution sodicity, at which an acceptable reduction in the soil hydraulic conductivity (10–25%) is maintained without further soil structural degradation. The traditional method of determining CTH is via leaching columns, which are laborious and often expensive. Dispersive potential (PDIS) is potentially a more rapid method with which to determine the CTH in a practical sense and make management recommendations for water quality use on a given soil. This work evaluated the PDIS method against known CTH data to determine the efficacy of use for non-dispersive soils irrigated with marginal quality saline sodic water. Results suggest that the PDIS approach to CTH did not reliably, or efficiently, determine the CTH in non-dispersive soils equilibrated with an irrigation solution. Using it to determine the aggregation and dispersion boundary for initially non-dispersive soil appeared to have merit, but only where the aggregates equilibrated with the irrigation solution were subject to rapid dilution with deionised water. |
Keywords | dispersion, equilibration, sodium absorption ratio, electrical conductivity, marginal quality water |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 410604. Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) |
410601. Land capability and soil productivity | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Civil Engineering and Surveying |
Centre for Sustainable Agricultural Systems | |
Department of Natural Resources and Mines, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4x88/evaluating-dispersive-potential-to-identify-the-threshold-electrolyte-concentration-in-non-dispersive-soils
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