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Hi All,
I have found a couple of interesting sites which you may wish to peruse. Most of the information is already known, however there are gems of information within them.
http://www.annadana.com/actu/fichiers/Caquetabasin.pdf
Up and Down in Moxos: New data about Amazonian Dark Earth (ADE).
Uriel
The mind is like a parachute its totally useless unless it is open