5621: Mineral or chemical fertilizers, nitrogenous

56211: Ammonium nitrate, whether or not in aque. solution 56212: Double salts, mixtures of ammonium sulphate-nitrate 56213: Ammonium sulphate 56214: Double salts, mixtures of calcium-ammonium nitrates 56215: Calcium cyanamide 56216: Urea, whether or not in aqueous solution) 56217: Mixture of urea and ammonium nitrate 56219: Other nitrogenous fertiliz. (incl. mixtures, n.e.s.) 5621: Mineral or chemical fertilizers, nitrogenous