DAP, or diammonium phosphate, is a widely used fertilizer containing both nitrogen and phosphorus, with chemical formula (NH4) 2 HPO4. It's known for its high water solubility and quick release of nutrients, making it suitable for various crops and soil types. DAP is a crucial fertilizer for plant growth as it supplies both nitrogen and phosphorus, essential nutrients for various stages of plant development. Nitrogen supports leafy growth and overall plant vigor, while phosphorus promotes root development, flowering, and fruiting, ensuring balanced and healthy plant growth, making it a popular choice among farmers for improving crop yield and quality.