Biochar talk for coffee farmers
Ben Driscoe, June, 2010
I gave a 40-minute talk on biochar recently to the Kona Coffee Grower's Association (here on the island of Hawai'i).
10 minutes of it got uploaded: http://www.youtube.com/watch?v=42gr_1whjc8
It covers the basic carbon cycle, biochar's agricultural use, interaction with nutrients and microbes, reversing fossil fuel use, appropriate sources of renewable biomass.. my sources of information are, basically, this mailing list, and my own experiences making and using biochar.
I also gave the historial terra preta story, talked about various ways to make char, interaction with compost, how to charge with various nutrients including urine, and other stuff that didn't make it into the 10 minute clip.
Also see Ben's super awesome Biochar Notes page: http://ahualoa.net/ag/notes_biochar.html