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![](./images/clear.gif) 1.- ASSESSMENT OF CATION AND ANION EXCHANGE AND PH BUFFERING IN AN AMAZONIAN ULTISOL
ELSEVIER; AMSTERDAM; NLD; NETHERLANDS, 2001
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![](./images/clear.gif) 2.- MODELLING CHANGES IN CATIONS IN THE TOPSOIL OF AN AMAZONIAN ACRISOL IN RESPONSE TO ADDITIONS OF WOOD ASH
BLACKWELL SCIENTIFIC FOR THE BRITISH SOCIETY OF SOIL SCIENCE; OXFORD; GBR; UNITED KINGDOM, 1999
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