Quote:
Originally Posted by pjkfarm
So what happened with this thread? Two Questions: the difference between biochar and activated was described, but not biochar and charcoal (conflicting notes as one line said they were the same, another suggested there were differences). We have large quantities of charcoal left over from disposal of land clearing debris - often thought of the bio-char in the Amazon and the stories about the wonders it did down there.
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Biochar/horticultural charcoal has a high cation ratio which makes it good for horticulture while lump charcoal has a much lower cation ratio. Burning most of the fuel out of the lump charcoal will raise it's cation ratio. We use an immense amount of biochar for our plants and use lump charcoal for grilling.