One thing is certain: the finer the biochar the better.
The easiest way to powder your char after it is produced and hosed down with water to stop from burning is obtain a small concrete mixer and throw some decent sized rocks in to crush the char into a powder.
This makes the whole assimilation process front to back more seemless
The other thing is biochar lasts virtually forever in the soil so the idea is to continue planting in the same spot and charge the soil with various teas when needed and eventually the charge is self maintained through the expansion of the biosphere under the soil.
Last little tidbit: I have heard this TP can increase dozens of feet into the soil over time through water carry/transport eventually reaching the water table/well and creating a water/electric connection with the soil surface transporting microbes and electricity through the fungus web from the well to the surface which also cleans the well water and expands the bioweb even faster.