Talk:Hydrothermal Carbonization
I'd need to read up on this, but given the Pyrolysis Oil / Bio-Tar content, i would imagine it would not be a good soil additive (essentially like watering your garden with Waste Motor Oil , but yeah.
The orignal edits may have been referring to some sort of process where only a Charcoal / Carbon Black Type Substance remains though, in which case they would be right.
I need to read up more on this, but i thought i'd point that out.