I always though biochar had to be made in a specially built burner that burns it fast without generating too much ash. This method is simpler though.
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I always though biochar had to be made in a specially built burner that burns it fast without generating too much ash. This method is simpler though.
I haven't tried the method you described yet so I can't speak to it. This pile method seems simplest to me for working with a large amount of fuel especially!