Management of vertisols in Sub-Saharan Africa : proceedings of a conference held at ILCA, Addis Ababa, Ethiopia;31 August -4 September 1987 /

Antzeko izenburuak

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• Advanced chemical methods for soil and clay minerals research : proceedings of the NATO Advanced Study Institute held at the University of Illinois, July 23-August 4, 1979 /
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• A modified procedure for the more rapid determination of the clay content (<2um) of soils /
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• The Influence of vegetation on clays
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