If you don't have any other safe and healthy way to dispose of it (maybe a compost pile?):
You only have two acres so drop the lawn mower deck down low enough to wear it will cut the manure up into dust<---after leaving the piles a few days to dry out in the sun, so they scatter easier.
It's a really slick trick if you can manage the scalping of the manure piles right before you know it's going to rain
Just gotta remember to bring the deck back up to normal cutting height right after you go over the dried out manure pile