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U.S. Harmonized Tariff Schedule

CHAPTER 31

fertilizers

31-1

Notes

1. This chapter does not cover:
- (a) Animal blood of heading 0511;
- (b) Separate chemically defined compounds (other than those answering to the descriptions in note 2(a), 3(a), 4(a) or 5, below); or
- (c) Cultured potassium chloride crystals (other than optical elements) weighing not less than 2.5 g each, of heading 3824; optical elements of potassium chloride (heading 9001).
2. Heading 3102 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
- (a) Goods which answer to one or other of the descriptions given below:
  - (i) Sodium nitrate, whether or not pure;
  - (ii) Ammonium nitrate, whether or not pure;
  - (iii) Double salts (whether or not pure) of ammonium sulfate and ammonium nitrate;
  - (iv) Ammonium sulfate, whether or not pure;
  - (v) Double salts (whether or not pure) or mixtures of calcium nitrate and ammonium nitrate;
  - (vi) Double salts (whether or not pure) or mixtures of calcium nitrate and magnesium nitrate;
  - (vii) Calcium cyanamide, whether or not pure or treated with oil;
  - (viii) Urea, whether or not pure.
- (b) Fertilizers consisting of any of the goods described in (a) above mixed together.
- (c) Fertilizers consisting of ammonium chloride or of any of the goods described in (a) or (b) above mixed with chalk, gypsum or other inorganic nonfertilizing substances.
- (d) Liquid fertilizers consisting of the goods of subparagraph (a)(ii) or (a)(viii) above, or of mixtures of those goods, in an aqueous or ammoniacal solution.
3. Heading 3103 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
- (a) Goods which answer to one or other of the descriptions given below:
  - (i) Basic slag;
  - (ii) Natural phosphates of heading 2510, calcined or further heat-treated than for the removal of impurities;
  - (iii) Superphosphates (single, double or triple);
  - (iv) Calcium hydrogenorthophosphate containing not less than 0.2 percent by weight of fluorine calculated on the dry anhydrous product.
- (b) Fertilizers consisting of any of the goods described in (a) above, mixed together, but with no account being taken of the fluorine content limit.
- (c) Fertilizers consisting of any of the goods described in (a) or (b) above, but with no account being taken of the fluorine content limit, mixed with chalk, gypsum or other inorganic nonfertilizing substances.
4. Heading 3104 applies only to the following goods, provided that they are not put up in the forms or packages described in heading 3105:
- (a) Goods which answer to one or other of the descriptions given below:
  - (i) Crude natural potassium salts (for example, carnallite, kainite and sylvite);
  - (ii) Potassium chloride, whether or not pure, except as provided in note 1(c) above;
  - (iii) Potassium sulfate, whether or not pure;
  - (iv) Magnesium potassium sulfate, whether or not pure.
- (b) Fertilizers consisting of any of the goods described in (a) above mixed together.
5. Ammonium dihydrogenorthophosphate (monoammonium phosphate) and diammonium hydrogenorthophosphate (diammonium phosphate), whether or not pure, and intermediates thereof, are to be classified in heading 3105.
6. For the purposes of heading 3105, the term "other fertilizers" applies only to products of a kind used as fertilizers and containing, as an essential constituent, at least one of the fertilizing elements nitrogen, phosphorus or potassium.