Josiah has a background in Agroecology and Ecology, and he has been working both in landscaping, and in making Biochar. See his web site for more details http://www.landscapeecology-hawaii.com/
This is the poster backdrop for the IBI booth at Ames. The photo of the two guys tilling in biochar (taken by me) was soon after planted in Taro and is the same as is shown below and in the Taro series.