[Terrapreta] Successful charcoal burn

[Richard Haard]

Making charcoal at 4CN for our experimental study.

Engineer and Landscaper, Terese and Larry, did a great job last  
weekend building this woodstack for a charcoal burn.

  restacking wood from last weeks partial burn for a top lit down  
draft charcoal burn

http://farm1.static.flickr.com/169/458350065_21b4d4379c_o.jpg

Finished pile with air supply pipes

http://farm1.static.flickr.com/235/458350069_b31b1a9b05_o.jpg

earth covered pile a few hours after lighting

http://farm1.static.flickr.com/206/458350077_eddb136e0a_o.jpg

Larry estimates a 40 % yield in charcoal by volume.

http://farm1.static.flickr.com/175/458342450_8f7ccb5c98_o.jpg