DAP (diammonium phosphate) fertilizer is a widely used granular fertilizer providing nitrogen and phosphorus for plant growth, containing approximately 18% nitrogen and 46% phosphorus. It is made by reacting phosphoric acid and ammonia and promotes early vegetative growth and strong root development. DAP is highly soluble, readily absorbed by plant roots, and often used in early stages of crop growth or in soils with low pH.
Key Characteristics
Nutrient Composition: DAP contains a high concentration of phosphorus (as phosphate, ~46%) and nitrogen (as ammonium, ~18%).
Physical Form: It is typically available as small granules.
Solubility: DAP is highly soluble, dissolving quickly in soil to release its nutrients for plant absorption.
pH Effect: The dissolving granule temporarily creates an alkaline pH