Biochar is charcoal from wood burning that is used to improve soil conditions for growing crops and to foster forest health. That knowledge is not new but in an effort to improve harvests without the need for undesirable chemical fertilizers and pesticides. Biochar is getting a lot of worldwide attention in recent years. If you operate an Air Burners FireBox you too can make a fair amount of Biochar without much effort and add a profit line to your business. Biochar, as a porous carbon substance that retains water makes nutrients more available thereby strengthening plants in agriculture, gardening and woodlands. It is produced naturally by forest fires and agricultural field burning.