Table 3. Percent of N by type in various UAN solutions.
As Table 3 indicates, 1/2 of the total N in UAN solutions is amide N (NH2-) derived from urea; 1/4 is ammonium N (NH4+) derived from ammonium nitrate, and 1/4 is nitrate N (NO3-) derived from ammonium nitrate.
Although there are several other forms of N fertilizers such as ammonium sulfate, calcium nitrate, and diammonium phosphate, over 80% of the N needs of corn in North America are met by anhydrous ammonia, urea and UAN solutions.
Read and follow all label instructions when using nitrogen inhibitors and urease inhibitors.
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