Potato growing question

Wait and see what his crop is like

I'd be interested to know what his crop is going to be like this year too, as this is exactly what I ended up doing this year on my plot !
I didn't want to, but I had no compost or topsoil; I wanted to try the no-dig method, but didn't have the old FYM that was needed really. I ended up filling a bed with fresh-ish horse manure and straw, made holes, and put in tatties with a surrounding layer of old compost/topsoil, that wouldn't have much nutrients but also wouldn't burn the tatties when it got wet, as I thought the manure would. My rather forlorn hope was that the nutrients would diffuse through the damp soil to the tattie stem roots while they were young, and once a couple of months older the manure would not burn further root/tattie development. So far the shaws are growing fine, I just earthed them up with some molehills I was able to collect, but I have grave doubts about the yield to come - if I hadn't managed to plant tatties more conventionally elsewhere, I think I would have been inclined not to try this, but plant fruit bushes in amongst the FYM instead.
Of course, now I have been given a trailer load of beautifully well rotted FYM, and the offer of as much as I want - just after I have finished all my beds.