Diammonium phosphate (DAP) is the world’s most widely used phosphorus fertilizer. Because of its high nutrient content and favorable physical characteristics, it is the most widely used phosphatic fertilizer. DAP contains 46% P2O5 and 18% nitrogen by weight. Most concentrated phosphate-based fertilizer. It is perfect for any agriculture crop to provide full phosphorus nutrition throughout crop growth and development, as well as a starter dose of nitrogen and low sulphur.