Yes, there are text-books about commercial nursery production and I have one. Didn’t get an iota of useful info from it- my business is too unconventional. I also routinely ignore common advice, such as only keeping trees in same pots for a single season- I let the roots grow out of them into soil and every year or two dig up those roots and wrap them around the outside of the pot and bury again if I don’t sell the trees.
Anything that I dig and don’t sell in fall, I leave in the ground where it was growing and try to sell it as a bare root the following spring. But I also move trees from the fenced part of my nursery outside of that once they get well above the browse line, and when there’s time I try to get a lot of that done in the fall.