Further biochar musings

My recent experiment with biochar is working really well as a mulch for the feijoa trees at the farm.

I have been thinking of ways to refine the process to produce maximum charcoal and little or no ash. I should have stayed up all night to watch the previous burn but I didn’t and so lost a fair amount of the charcoal in the process. I’m now curious to see if it’s possible for me to produce charcoal with no ash at all.

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