Whats the story with soil carbon

Biochar is a resistent form of carbon and is therefore an effective way to help build soil carbon. This video explains the different forms of carbon in soil being labile, humus and resistent. Fertcare is a joint venture with the Australian Fertilizer Services Association - the industry association representing manufacturers, importers and distributors of fertilizer in Australia, and associated service industries. https://www.youtube.com/watch?v=LEYOkgcu6Cw