It's pretty much all through the biochar forum, but I can summarize.
After I burn the biochar, I crush it by driving over it between two panels of plywood. Then I inoculate it with nutritious stuff, which is required if you want it to work for the next two years. There are many possible nutrients to use, but I mix in whole wheat flour, rotten
wood mycelium, worm castings,
compost, rotten fruit, crushed oyster shells and
urine. I drench it every day with the mixture for two weeks. It doesn't smell that great, but the
trees love it!
I dig it in one spade deep, or 9 inches or so, jimmying it back and forth to make a crevasse, which I fill with biochar at the
drip line of each tree.
John S
PDX OR