How to (Sort of) Make Biochar (Fire, fire, FIRE!)
Careful! This could happen to your potato rake!
Intro:
Holy crap! There's a lot of science in that article! You should totally skip that. I'm certainly more comfortable with wikipedia articles that are more along the lines of anything on this list: http://en.wikipedia.org/wiki/Wikipedia:List_of_really,_really,_really_stupid_article_ideas_that_you_really,_really,_really_should_not_create (I really like #13, #38 and #39)
Seriously though, here's the way it works: