What is DAP in shipping? Learn how Delivered at Place Incoterms work, who handles costs and risks, and when DAP is the right choice for your shipment. Di-ammonium Phosphate popularly known as DAP is a preferred fertilizer in India because it contains both Nitrogen and Phosphorus which are primary macro-nutrients and part of 18 essential plant nutrients. DAP (NH4)2HPO4: Fertilizer grade DAP Contains 18% Nitrogen and 46% Phosphorus (P2O5).. What is DAP fertilizer and how does it help Indian farmers ? What is DAP fertilizer DAP fertilizer full form is Diamonimum Phosphate which is the widely used fertilizer by the farmers. It is high in nutritional value and is popular among the farmers. The ammonium phosphate fertilizer was first made available in the year 1960. Phosphoric acid reacts with ammonia to form a hot slurry which is then cooled to get the granulated products. The nutrient value stands at relatively high grade at 18-46 ... The article elaborates on the full form of DAP . The article gives a brief definition, chemical formula, and description of DAP . It also includes a discussion on the uses and functions of DAP .