It's a comparison of the markets for different kinds of biochar: Wood, manure, crop residue, compost, and mixed feedstock. It shows the differences between them. I couldn't figure out how to transfer the information from facebook. Sorry,
John S
PDX OR
One thing I've noticed at big box stores is the better quality grow mixes loudly declare a percentage of biochar in the mix.
I don't buy this stuff, but I like how it normalizes and promotes biochar as a premium soil additive. It's like a kind of brand recognition in the public mind, regardless of the company selling it.
You will always be treated with dignity. Now, strip naked, get on the probulator and hold this tiny ad:
It's a bit like "run away to the circus" but for gardeners