Good point. Last year's drought = not all nitrogen was used up in corn, lawns, etc. Some folks water, but most don't. Hit & miss. Mother Nature will dictate. ISU experimented with as much as 10 lbs per K of actual N last year >> results were awesome.
We plan to attend their annual turfgrass field day on August 1, 2013.
Proud subscriber of TURF Magazine. (thanks Ron)