3104 - Mineral or chemical fertilizers, potassic:

Category 3104 encompasses a specific group of mineral or chemical fertilizers where potassium is the primary nutrient. This chapter, "Fertilizers," within Section VI of the Harmonized Tariff Schedule, broadly covers substances used to enrich soil and promote plant growth. Within this context, 3104 distinctly focuses on potassic fertilizers, differentiating them from other major fertilizer types found at the same HTS level, such as those primarily based on nitrogen (e.g., urea, ammonium nitrate) or phosphorus.

Unlike its sibling categories which deal with live animals, category 3104 is firmly situated within the realm of chemical and mineral products. Its purpose is exclusively agricultural, aimed at providing essential potassium to plants, which is vital for fruit development, disease resistance, and overall plant vigor. The classification is based on the chemical composition and the intended use as a fertilizer, irrespective of whether the potassium is derived from natural mineral deposits or synthesized through chemical processes.

The subcategories within 3104 break down these potassic fertilizers by their specific chemical form. For instance, 3104.20.00 covers potassium chloride, a widely used and economical source of potassium. Similarly, 3104.30.00.00 distinguishes potassium sulfate, often preferred for certain crops or soil conditions where chloride sensitivity is a concern. The residual category, 3104.90.01.00, accounts for other potassic fertilizers not specifically enumerated, ensuring comprehensive coverage of all products within this classification.