https://fearsteve.com/shopping/what-is-an-npk-fertilizer-line/ An NPK fertilizer line, or nitrogen-phosphorus-potassium (NPK) ternary compound fertilizer production line, is a complete automated equipment system that processes nitrogen, phosphorus, and potassium—three basic raw materials—in a scientifically proportioned manner into granular compound fertilizer. Wed, 04 Mar 2026 06:15:31 UTC en