"By working to shield nitrogen on a molecular level, NutriSphere-N keeps enzymes at bay so more nitrogen remains in the ammonium form making it more readily available to plants. And because up to 50% of applied nitrogen can be lost to leaching, volatilization and denitrification, its important to choose the stabilizer proven to defend nitrogen against all three forms of loss. No wonder farmers in more than 40 states are protecting their nitrogen investment with NutriSphere-N." Good find Riggle... according to how this reads it seems that the "enzymes at bay" isn't just slow-release, but actually keeps the N in usable form longer... Is it true that slow release Urea, for exa., may be released, but then may be lost to volatization,,, whereas as this product keeps the N from being lost to leaching, volatization and denitrification... If that is a true concept behind the product then I would have to say that it is a superior technology to the slow release coating technology... I wonder if the 2 could be combined so that virtually no N would be lost???