Here's an excellent current research piece on biochar production. A little weighty but well worth one's time.
This describes the technique I've found to work best on my site.
Update on Wailua Diversion - SUBHEAD: Debriefing on BLNR meeting on Grove Farm diversions of Wailua River waters. By Bridget Hammerquist on 12 December 2017 in Island Breath - (http...
1 day ago