A market view on China’s recent customs review of MKP, its possible HS code repositioning, and the potential impact on export procedures, supplier qualifications, and global fertilizer supply chains.

Calcium Nitrate Tetrahydrate (CNT), with the chemical formula Ca(NO₃)₂·4H₂O, is a high-purity, fully water-soluble, chloride-free inorganic salt. It appears as white to transparent crystals or granules, with excellent solubility in water and moderate hygroscopicity.

This guide summarizes the core functions of nitrogen, phosphorus and potassium, typical deficiency symptoms, risks of excessive application, main causes of deficiency and practical correction methods, providing growers with clear and field-applicable guidance for crop diagnosis and fertilization management.