"I wanted to add a comment to Tom's excellent introduction to this topic.
While volcanic rock products are often marketed as "natural" and OMRI listed for use in organic agriculture, it is important to remember that all magmatic…"
"Just joined the community, wanted to jump into some of these topics...
I am working on a large-scale reclamation project in California to convert volcanic cinders into agricultural inputs. I am aware of all the volcanic cinder companies that are…"