Making Biochar to Improve Soil

By making biochar from brush and other hard to compost organic material, you can improve soil — it enhances nutrient availability and also enables soil to retain nutrients longer.

making biochar - improve soil
One method of making biochar: pile up woody debris in a shallow pit in a garden bed; burn the brush until the smoke thins; damp down the fire with a one-inch soil covering; let the brush smolder until it is charred; put the fire out. The leftover charcoal will improve soil by improving nutrient availability and retention.
ILLUSTRATION: ELAYNE SEARS