// definition
DAP
Diammonium phosphate
Short definition
A fertilizer supplying nitrogen and phosphorus, manufactured from ammonia and phosphoric acid. Its standard 18-46-0 grade contains 18% nitrogen and 46% available phosphate expressed as P₂O₅ equivalent. The second figure is neither elemental phosphorus content nor the share automatically taken up by a crop.
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Related analyses
- Hormuz: five ships and the crop calendarSulfur, phosphates and fertilizer availability for growers.
Primary sources
- University of Minnesota Extension, Understanding phosphorus fertilizersManufacturing and 18-46-0 grade; table 1 reports available phosphate as P₂O₅, distinct from elemental phosphorus.