AUREA, 34, is, a, slow, release, treated, granular, nitrogen, fertilizer,, containing, 23%, of, Ureic, and, 11%, of, Ammoniacal, nitrogen., the, ureic, nitrogen, is, treated, with, N-(nbutyl), thiophosphoric, triamide, (NBPt),, a, chemical, urease, inhibitor., this, treatment, slows, down, the, transformation, from, the, Ureic, nitrogen, to, ammonia, (highly, volatile)., As, Aurea, 34, contains, also, Ammoniacal, nitrogen, and, sulphuric, Anhydride, (30%), the, acidifying, effect, on, the, soil, is, enhanced.