[Terrapreta] coal as a soil amendment

[Michael Bailes]

http://www.atu.edu/acad/mining/people/misk/lignite.htm

-- 
Michael the Archangel

"You can fix all the world's problems in a garden. . . .
Most people don't know that"
FROM
http://www.blog.thesietch.org/wp-content/permaculture.swf
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