Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/27317
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Type: Journal article
Title: The rapid assessment of concentrations and solid phase associations of macro- and micronutrients in alkaline soils by mid-infrared diffuse reflectance spectroscopy
Author: Bertrand, I.
Janik, L.
Holloway, R.
Armstrong, R.
McLaughlin, M.
Citation: Australian Journal of Soil Research, 2002; 40(8):1339-1356
Publisher: C S I R O Publishing
Issue Date: 2002
ISSN: 0004-9573
Statement of
Responsibility: 
I. Bertrand, L. J. Janik, R. E. Holloway, R. D. Armstrong and M. J. McLaughlin
Abstract: Chemical analysis is a crucial but often expensive and time consuming step in the characterisation of soils. Mid-infrared diffuse reflectance (MIR-DRIFT) spectroscopy coupled with partial least square (PLS) analysis was used to determine macro- and micronutrient concentrations of a range of alkaline soils from southern Australia. Solid phase associations of macro- and micronutrients were also investigated using the mineralogical information contained in the infrared spectra of soil samples. Results showed that MIR-PLS analysis is a powerful and rapid technique for the accurate prediction of more than 15 chemical properties from each soil sample spectrum. Correlation coefficients for MIR derived concentration versus laboratory determined values were greater than R2 = 0.80 for soil moisture, calcium carbonate concentration, total concentration of Mg, K, S, Fe, Al, Mn, Zn, Cu, and oxalate- extractable Al, Fe, Mn, and Si. In calcareous soils, sulfur was associated with carbonate and conversely Mg was more related to the clay concentration of soils. Micronutrients such as Fe, Zn, Mn, and Cu were positively associated with smectite/illite in the clay fraction and negatively with kaolinite. The potential use of these results in partitioning model to assess plant available micronutrients pools is discussed.
Keywords: Alkaline soils; mid-infrared spectroscopy; carbonates; clays
Description: © CSIRO 2002
RMID: 0020022106
DOI: 10.1071/SR01104
Appears in Collections:Soil and Land Systems publications
Environment Institute publications

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