The same problem is showing up in wheat fields around here. Right now its is worse on flatter ground or seep spots. Its a race to see if the wheat can finish before the wet weather kills it. My early wheat is the milk/soft dough stage. The really bad thing about this year is all the better ground has the most problems the  bottom ground corn has terrible issues with drown out, flood  damage ,and its stunted and yellow.  We really need dry weather and the weather forecasts just keep getting wetter.