Mr. Erich Knight sent me a link to the Hypography science forum and the discussion concerning biochar and terra preta. I have not followed and read everything the links connect, but it looks like a good thing to share.
I did not know about this hypography forum, Thank you for sharing Erich,
http://hypography.com/forums/terra-preta/3451-terra-preta-parent-thread-started-all-14.html
Bye for now, Doug
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