The production method determines nutrient uniformity, physical properties, and field performance of compound fertilizers.
Chemical granulation (such as tower granulation, slurry granulation) mixes raw materials before pelletizing, ensuring every granule has identical NPK ratios. This type is uniform, low‑dust, slow‑release, and suitable for precision agriculture.
Bulk blending mixes finished single‑nutrient granules mechanically. It is flexible and cost‑effective but requires strict control of particle size and density to avoid segregation during transport and application.
High‑quality compound fertilizers have consistent granules, low moisture, high crushing strength, and good solubility. They release nutrients steadily to match crop uptake, reduce waste, and lower environmental impact. Manufacturers increasingly add additives to improve efficiency, such as urease inhibitors, nitrification inhibitors, and humic acid, creating slow‑release or controlled‑release compound fertilizers for greener farming.
