HelenaMore biochar info
Seems very sensible info, mentions using it for long term carbon storage at the end.
The Truth about Biochar: How to use it correctly (and what to avoid)
From Sunnyside Soil
https://m.youtube.com/watch?v=RTcY90g0wIs&pp=ugUHEgVlbi1VUw%3D%3D&ra=m
