3102: Mineral or chemical fertilizers, nitrogenous

310210: Urea, wthr/nt in aqueous solution in packages weighg more than 10 kg 310221: Ammonium sulfate, in packages weighing more than 10 kg 310229: Ammonium sulfate/nitrate mixtures/double salts in pack weighg > 10 kg 310230: Ammonium nitrate, whether or not in aqueous sol in pack weighg > 10 k 310240: Ammonium nitrate mixd w cal carb o non-frt subts in pack weighg >10 k 310250: Sodium nitrate, in packages weighing more than 10 kg 310260: Calcium nitrate/ammonium nitrate mx or double salts in pack of > 10 k 310270: Calcium cyanamide in packages weighing more than 10 kg 310280: Urea/ammonium nitrate mx in aqueous/ammoniacal sol in pack of > 10 kg 310290: Mineral or chem fertilizers nitrogenous, nes, in pack weighing > 10 k 3102: Mineral or chemical fertilizers, nitrogenous