Courtesy of Teryl R. Roper.  © 2008. (during his time at the Dept. of Horticulture, Univ. of Wisconsin-Madison) Nitrogen [N]: See also: Nitrogen for Bearing Cranberries in North America (Oregon State University) What is Nitrogen used for? Nitrogen in the ammonium form is used in the formation of amino acids.  Amino acids are assembled in appropriate order