[Terrapreta] The Science of Terra Preta Formation

[Philip Small]

> ----- Original Message -----
> *From:* Jim Joyner <jimstoy at dtccom.net>
> *To:* Greg and April <gregandapril at earthlink.net>
> *Sent:* Sunday, April 06, 2008 12:50
> *Subject:* Re: [Terrapreta] The Science of Terra Preta Formation
>
>
> There is no evidence that char does provide cation exchange...
>
>
Char increases CEC, but it takes time for the biogeochemistry to work.  The
BC surface must oxidize.
See "Black Carbon Increases Cation Exchange Capacity in
Soils<http://soil.scijournals.org/cgi/content/full/70/5/1719>"
published in SSSAJ, 2006.
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