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Is silt the most influential soil grain size fraction?

By S.A. Parry, M.E. Hodson, E.H. Oelkers and S.J. Kemp


The contribution of individual grain size fractions (2000–500, 500–250, 250–63, 63–2 and < 2 μm) to bulk soil surface area and reactivity is discussed with reference to mineralogical and oxalate and dithionite extractions data. The 63–2 μm fraction contributed up to 56% and 67% of bulk soil volume and BET surface area, respectively. Consideration of these observations and the mineralogy of this fraction suggest that the 63–2 μm fraction may be the most influential for the release of elements via mineral dissolution in the bulk soil.\ud \u

Publisher: Elsevier
Year: 2011
DOI identifier: 10.1016/j.apgeochem.2011.03.045
OAI identifier:

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