And I don't see why having the Nitrogen there when the grass is wanting it is a bad thing...we apply fall NH3 to corn fields and spray 28% on frozen ground for wheat...both grasses. There are studies from the University of Colorado indicating a much higher utilization rate of N when a hi dose is applied late in the Fall for Spring. And to your second point, at least on the ag side, we ALWAYS talk in use rate, not AI. 32oz of Roundup PowerMax is 32oz total, 150 # ESN per acre is just that, not 150# of the N equivalent...so when I stated in my first post that I was using 8# of 12-12-12 per 1000 feet, I'm only putting down .96 # of N, P, and K per 1000 or right at 43# (give or take) per acre. Hardly what I would call excessive, perhaps heavy on the P and K, but very light on N. I wasn't aware that the turf markets used AI, that seems like it would be horribly confusing!