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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/878

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Title: Integrating physical and chemical techniques to characterise soil microsites
Authors: Otten, Wilfred
Grinev, Dmitri
Baveye, Philippe C.
Wang, Zi
Hapca, Simona M.
Wilson, Clare
Affiliation: University of Abertay Dundee. Scottish Informatics, Mathematics, Biology and Statistics Centre
Keywords: X-ray tomography
Soil-micro habitat
Scanning electron microscope
Co-kriging modelling
Issue Date: Aug-2010
Publisher: International Union of Soil Sciences
Type: Conference Paper
Refereed: peer-reviewed
Rights: Published version (c)International Union of Soil Sciences, available from http://www.iuss.org/19th%20WCSS/title/Title_I.html
Citation: Otten, W., et al. 2010. Integrating physical and chemical techniques to characterise soil microsites. In: R.J. Gilkes and N. Prakongkep, eds. Proceedings of the 19th World Congress of Soil Science: Soil Solutions for a Changing World, Brisbane, Australia 1-6 August 2010. Brisbane: IUSS. pp.60-63
Abstract: Many problems in environmental and soil research require techniques that quantify the soil microenvironment. It has become increasingly apparent that we need novel micro-analytical techniques to compliment well established methods that study soils at macro-spatial scales. Despite tremendous progress in this field over the last decade, quantitative methods have developed within separate disciplines and operate at different spatial scales hampering their integration. Moreover, it means that opportunities to integrate these methods may be overlooked. In this paper we develop methods that enable integration of a 3-D non-invasive technique to characterise soil structure (X-ray CT) with a 2-D spectroscopic method that characterises the spatial distribution of chemical elements on surfaces (SEM-EDX). First we developed statistical software to locate the 2-D plane in which SEM-EDX analyses were performed within the 3-D volume. Then we demonstrate that selected compounds, including particulate sources of C and CaCO3, can be quantified with SEM-EDX and subsequently visualized within the 3-D soil environment. Finally, we demonstrated that when we characterized sequential slices with SEM-EDX we could use co-kriging methods to predict the 3-D spatial distribution of chemical elements. We discuss the possibilities and problems that need to be resolved to combine these methods.
URI: http://hdl.handle.net/10373/878
Appears in Collections:SIMBIOS Collection
Science Engineering & Technology Collection

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