Fertilizers: NPK, urea manufacture
Industrial Chemistry · Chemistry
Study notes
Why is urea the world's most used nitrogen fertilizer? Step 1: 46% nitrogen — highest N content of common fertilizers. Step 2: Made from NH₃ (Haber) + CO₂ — cheap feedstocks. Step 3: Soil urease converts to NH₃/NH₄⁺ — plant-available. Step 4: Max nitrogen per rupee — economics picks urea!