i also await answers with interest, my spuds are popping through nicely and i've earthed them up a but, but i've a tonne of cow manure that i could be adding instead of jsut compost.
I hsve 4 beds of spuds, so i might just do 1 bed with manure just now and do the other 3 with the compost that served me so well last year.
if all goes well, i'll do more with manure next year