Lol I'm not saying I know how to do it large scale, I'm assuming you're gun a do the barrel within a barrel method?
The real large scale is the ring of fore method. But I am also going to try to do it on my slash piles and squelch with a trash pump I just bought.
I guess large is relative, for a garden 55gallons is a lot. For pasture, I need tons like nunya was discussing