in relation to this old post, I found the following link:
https://fellowsblog.ted.com/how-to-grow-a-forest-really-really-fast-d27df202ba09
Looks like the method of growing small forests quickly contains at least:
Soil amendment, 1-time digging-in of organic matterPlanting trees so close as that they compete for lightInfuse mushrooms if necesaryMulching
Has anyone experience with imitating this method? I would love to try it with a mix of native and fruit trees ...