Here's an excellent current research piece on biochar production. A little weighty but well worth one's time.
http://www.biochar.org/joomla/images/stories/SteinerPhDSummary.pdf
This describes the technique I've found to work best on my site.
Why I Never Call Myself an “Expert”
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Random musings about goats and experts and the “beginner mindset”… Years
ago when someone asked Michael Jordan if he was “The G.O.A.T.” (=“Greatest
Of All ...
6 days ago