I grew up on a farm, so you would think I should know this....
In actual fact I ran whenever it was hay bail tossin' time, and never really paid much attention to the intricacies of raising crops. However, I do remember something about needing 3 days of sunny weather before and after you cut you crops so they don't spoil. Because of the amount of rain this summer it has been pretty hard for farmers to achieve that.
I dunno though. Me stoopid.