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Geochemistry of cobalt in soils of western Andalusia. V. Cobalt extractable by ammonium acetate and acid solutions, and representation of the cobalt cycle



Geochemistry of cobalt in soils of western Andalusia. V. Cobalt extractable by ammonium acetate and acid solutions, and representation of the cobalt cycle



An. Edafol. Agrobiol, 23: 697-704



& F. XXVIII and. Ammonium acetate at pH7 extracted negligible amounts of Co from soils of the Guadalquivir valley. Greater amounts were extracted when the acidity was increased to pH3 or the extractant was 0.1 or 0.5n HC1. Insolubility of Co was attributed to the highly dehydrated free oxides.

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