by Thayer Tomlinson

There are many types of soil additives and fertilizers used to improve the structure and functions of soil. One that has re-emerged in the last five years is biochar, a solid material obtained from the thermochemical conversion of biomass in an oxygen-limited environment—which creates a fine-grained, highly porous charcoal. Interest in biochar has increased recently as horticulturalists are looking for sustainable ways to improve soils and decrease their use of chemical fertilizers. Continue reading