This is a list of posts dealing with terra preta in particular and is meant to help you navigate through the development of my thinking. There are other posts apropos to the subject, but this should get you through it.
http://globalwarming-arclein.blogspot.com/2007/06/carbonization.html
http://globalwarming-arclein.blogspot.com/2007/06/corn-cultures-bright-furure.html
http://globalwarming-arclein.blogspot.com/2007/06/total-carbon-sequestration-potential.html
http://globalwarming-arclein.blogspot.com/2007/06/tropical-soils_26.html
http://globalwarming-arclein.blogspot.com/2007/07/discussion-with-ron-larsen-on-terra.html
http://globalwarming-arclein.blogspot.com/2007/07/human-labor.html
http://globalwarming-arclein.blogspot.com/2007/07/those-amazonian-soils.html
http://globalwarming-arclein.blogspot.com/2007/07/pollutants-from-carbonization.html
http://globalwarming-arclein.blogspot.com/2007/07/nutrient-accumulation.html
http://globalwarming-arclein.blogspot.com/2007/07/uniqueness-of-corn-culture.html
http://globalwarming-arclein.blogspot.com/2007/07/amazon.html
http://globalwarming-arclein.blogspot.com/2007/08/heat-distribution-and-terra-preta-soils.html
http://globalwarming-arclein.blogspot.com/2007/08/getting-job-done-biochar-on-modern-farm.html
http://globalwarming-arclein.blogspot.com/2007/08/tom-miles-comments-on-biochar.html
http://globalwarming-arclein.blogspot.com/2007/08/mel-landers-and-jackie-foo-on-field.html
http://globalwarming-arclein.blogspot.com/2007/08/methane-and-pottery.html
http://globalwarming-arclein.blogspot.com/2007/09/glopbal-corn-culture.html
Again you will see the evolution of my thoughts. It may be best to read backwards so that you always know were I end up.
