Determine the level of non-protein nitrogen (NPN) in the supplement, as illustrated in the following example. Multiply this percentage by the pounds of supplement fed per head daily.
Example: Feeding 1 pound of supplement with a feed tag guarantee of 20% crude protein equivalent from NPN:
20% NPN divided by 2.81 = 7.12%
1 pound/day x 7.12% urea =0.0712 pound urea/head daily.
