The next five methods are from an excellent video with Josiah Hunt from the Growing Your Greens youtube channel:
1.) Mix equal parts fresh green grass clippings and biochar. Mix together thoroughly and evenly. Cover and let cure in a dark moist place until grass is mostly composted (~2 months).
2.) Equal parts biochar and worm castings. Then 5% or less of any flour, corn meal or molasses. Cover and let cure for at least 2 weeks.
3.) Toss biochar in chicken coop bedding. This helps deodorize the coop and it gets inoculated with food scraps and chicken manure. Keep adding biochar to coop until it is time to clean out. Then pile up biochar and let cure.
4.) Pee on it. Seriously. This works. You can use a 5 gallon bucket with a few holes in the bottom.
5.) 4 parts biochar, 1 part micronized rock powder, 1 part worm castings, 1/2 part flour or molasses (microbe food). Mix together thoroughly and evenly. Cover and let cure for at least 2 weeks.
Dave [surl='https://richsoil.com/diatomaceous-earth.jsp' class='api' title='diatomaceous earth article wrote:de[/surl] Basque]
--What to inoculate with? And how much?
--How to do it exactly?
Here's how I do it. I make a lot of "tea" out of comfrey, nettle, and any other dynamic accumulators I have on hand. I just compress the plant matter in a 55-gallon plastic drum that has a small hole in the bottom. I add NO WATER. I want the "tea" as concentrated as I can get it. The leafy matter eventually decomposes and liquefies. The "tea" dribbles out of the hole in the bottom into a basin, and then is poured into two-gallon jugs. I use one part of this to 20 parts of water, in a couple of five-gallon buckets, to quench my biochar burns. I burn my char in 55-gallon steel drums. The quench inoculates the char immediately. I don't worry about "how much" the char has been inoculated because it all goes into the compost anyway. I get that your needs are different.