biochar

Biochar, or wood waste, is a porous carbon substance that results from burning wood in the absence of oxygen. It is typically created when burning chunks of wood are covered by ash, soil or a lid, which insulates the coals and starves them of oxygen. This fire remnant provides a valuable addition to soil for agriculture and gardening purposes as well as contributing to overall forest health.

“You can’t have a forest without a foundation of quality soil,” said Debbie Page-Dumroese, a soil scientist for the U.S. Forest Service’s Rocky Mountain Research Station in Moscow, Idaho. That’s the lesson learned when hundreds of ponderosa pines were planted on rocky streambanks in national forests—only to die during their first year.