3103.90.01.00 - Other

This category, HTS Code 3103.90.01.00, encompasses "Other" mineral or chemical fertilizers, phosphatic, that do not fall under the specific subheadings for superphosphates. This includes a broad range of phosphatic fertilizers characterized by their phosphatic content, which are essential for plant nutrition and soil amendment. The key criterion for inclusion here is the phosphatic nature of the fertilizer, excluding those already specifically detailed in other parts of Chapter 31.

Distinguishing this category from its sibling, "Superphosphates," is crucial. Superphosphates are specifically defined forms of phosphatic fertilizers produced by the action of sulfuric acid on phosphate rock, resulting in monocalcium phosphate. This "Other" category, therefore, covers phosphatic fertilizers derived from different chemical processes or combinations, or those not fitting the precise definition of superphosphates, but still providing essential phosphorus to the soil. Examples might include processed phosphate salts or blended fertilizers where phosphatic compounds are a primary component but not in the superphosphate form.