AGROTAIN® Control Nitrogen Loss for Higher Yields When you surface apply urea or liquid nitrogen (UAN), nitrogen loss can severely limit the return on your investment. For just pennies per pound, AGROTAIN® nitrogen stabilizer keeps your fertilizer dollars from disappearing into thin air by blocking the enzyme urease. AGROTAIN® nitrogen stabilizer can be blended with urea and UAN fertilizers, giving nitrogen time to move into the soil instead of the atmosphere. As a result, your crop can access the nutrition it needs. With the right growing conditions, the increase of available nitrogen can convert into higher yields.