Diammonium fertilizer is a crucial source of nitrogen and phosphorus for crop production. NPK Ratio A typical DAP bag contains 18% nitrogen, 46% phosphorus pentoxide and 0.0% potassium, often expressed as 18‑46‑0 (NPK). Current Prices As of 2025 the standard price for a 50 kg of DAP in Kenya ranges from KES 6,500 read more to KES 8,500,