3102.90 Mineral or chemical nitrogen fertilisers (excl. urea; ammonium sulphate; ammonium nitrate; sodium nitrate; calcium cyanamide; double salts and mixtures of ammonium nitrate with ammonium sulphate or calcium; mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution; mixtures of ammonium nitrate and calcium carbonate or other non-fertilising inorganic elements; in tablets or similar in packages <= 10 kg) 0 0 0 0 0