now making biochar to add to the living soil i'm working on, crushed charcoal and worm juice inoculant.....anyone with a suggestion as to percentage volume of mixing....i'm thinking 10% to the volume of compost and worm compost i have already established....both compost and worm compost approx 2 years old. to this i will add clay nodules 1/3 of compost materials.....would be interested to hear from guys nd gals who are already using biochar...respect to all.