Heading 3101: Fertilizers; Animal or Vegetable, whether or not … etc.
Heading 3102: Fertilizers; Mineral or Chemical, Nitrogenous
Heading 3103: Fertilizers; Mineral or Chemical, Phosphatic
Heading 3104: Fertilizers; Mineral or Chemical, Potassic
Heading 3105: Fertilizers; Mineral or Chemical, Containing 2 or 3 of the Elements … etc.