Section 06 Products of the chemical or allied 31 Fertilisers 31 02 Mineral or chemical fertilisers, nitrogenous 31 02 40 - Mixtures of ammonium nitrate with calcium carbonate or other inorganic non-fertilising substances Commodity Code Description 31 02 40 00 - Mixtures of ammonium nitrate with calcium carbonate or other inorganic non-fertilising substances