3105.90.00.50 - Other

This category, "Other," under HTS code 3105.90.00.50, encompasses fertilizing preparations not specifically enumerated in preceding headings or subheadings of Chapter 31. It serves as a residual classification for mineral or chemical fertilizers containing two or three of the primary fertilizing elements (nitrogen, phosphorus, and potassium), as well as other fertilizers not fitting into more specific categories. This includes formulations designed for soil enrichment and plant growth that do not fall under the description of compound fertilizers with specific N-P-K ratios, or those not presented in tablets or packages under 10 kg.

The key distinction of this "Other" category lies in its breadth, capturing a diverse array of fertilizing products. It differentiates itself from the sibling category 3105.90.00.10, which specifically covers mixtures of potassium nitrate and sodium nitrate, a particular type of fertilizer with a defined chemical composition. Therefore, any fertilizer meeting the general criteria of containing two or three primary nutrients, or otherwise classified as a fertilizer within the scope of Chapter 31, but not matching the specific description of potassium nitrate-sodium nitrate mixtures, would be classified here.

As this is a terminal classification (leaf node), there are no further subcategories. Classification within 3105.90.00.50 is determined by the exclusion of the goods from more specific HTS subheadings within 3105. The focus is on ensuring the product is a fertilizer containing at least two of the key nutrients, or a fertilizer otherwise within the scope of Chapter 31, and does not meet the criteria for other, more precisely defined classifications.