Biochar
BYE-oh-char🧑🌾 Cultivation●● Intermediate
Also known as: agricultural charcoal
Biochar is a stable form of carbon that persists in soil for centuries. Its porous structure improves soil aeration, water-holding capacity, and provides habitat for beneficial microbes and mycorrhizal fungi. In urban arboriculture, biochar is integrated into compacted root zones via pneumatic excavation (air-spading) to rehabilitate hostile soils around established trees.
Etymology
Bio (life) + char (charcoal)