Di-ammonium fertilizer represents a key source of N and phosphorus for farm production. Chemical Makeup The typical Di-ammonium phosphate bag contains 18.0% nitrogen, 46.0% phosphorus pentoxide and 0.0% potassium, commonly expressed as 18‑46‑0. Market Rates In 2024 the average price for a 50 kg of DAP click here in Kenya ranges from KES 6