Calcium and nitrogen are two essential nutrients in crop production. Nitrogen plays a central role in protein synthesis, chlorophyll formation, and plant metabolism, while calcium contributes to cell wall strength, membrane stability, root development, and fruit quality.

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.