TENEURS ELEVEES DE FER LIBRE ET IDENTIFICATION TAXONOMIQUE DE CERTAINS SOLS DU QUEBEC CONTENANT DE LA MAGNETITE
- 1 February 1969
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Soil Science
- Vol. 49 (1) , 1-9
- https://doi.org/10.4141/cjss69-001
Abstract
Free iron determined after extraction by acid ammonium oxalate was found to be abnormally high in various horizons of two Quebec soils containing magnetite, namely: an Orthic Humic Podzol (Pikauba series) and an Orthic Regosol (Malbaie series). When magnetite was removed, prior to the analysis, truer values for free amorphous sesquioxides of iron and aluminum were obtained and could serve to distinguish Podzolic from other classes of soils. The calculated pH-dependent cation exchange capacities were not affected by the presence of magnetite in soils. This last criterion, together with pH in CaCl2, exchangeable aluminum and degree of base saturation, can well serve as a substitute for differentiating Spodic B horizons from other horizons as used in the Canadian taxonomic classification of soils.Keywords
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