Dear Ron
I was thinking of purchased fertilizer, compost and permaculture. All three are means for soil amendment. I class AD’s top dressing as compost. Biochar seems to fall into the category of fertilizer – introducing something that does not occur naturally, certainly not at the levels intended. Regards Crispin Crispin: What alternatives to Biochar do you have in mind?. There are three parties likely to be involved with a number like $150/ton char: those willing to pay for an equal (roughly) amount of fuel/energy, those interested in soil improvement, and those interested in sequestering atmospheric carbon. If (big IF) we could get the atmospheric folk to do $50 - that is only about $17/ton CO2. Ron
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