"Aside from allowing me to cut my nitrogen rates in half without compromising turf quality, I have seen reductions in turf diseases, thatch, required mowing, fuel use and labor"
“It might seem obvious but the rate at which your grass grows has a huge impact on how expensive it is to maintain”
Those are the results Jason Haines described in his post about the evolution of precision fertilizer application. He explains how he makes use of observations, measurements, and predictions to find site specific nutrient requirements.
It’s a good read, and it has this animated chart that shows how N rates have decreased over the past few years.