Achim Ecker ist experimenting with Biochar - in his site in Portugal but also at ZEGG community. Here is an article about his successes.
https://www.biochar-journal.org/en/ct/63
Achim Ecker ist experimenting with Biochar - in his site in Portugal but also at ZEGG community. Here is an article about his successes.
https://www.biochar-journal.org/en/ct/63