As fertigation, drip irrigation, and precision nutrient management continue to develop, the value of fertilizer raw materials is no longer determined solely by how much nutrient they provide. Solubility, pH regulation, compatibility, and adaptability to irrigation systems have become equally important. Urea Phosphate (UP) is a representative example of this type of functional fertilizer ingredient. Formed from urea and phosphoric acid, it is commonly expressed as 17-44-0 in t