Fert salesman and trade shows are marketing a nitrification inhibitor for urea-based fertilizers called Uflexx. Data suggests that it will give a slower release than SCU at a slightly less cost. Any feedback on this would be welcome. Many years ago I did research work in college on a similar product called N-serve with anyhydrous ammonia. Product definitely worked. I just didn't know if it had been successfully applied to granular urea.