NPK 15-15-15 Compound Fertilizer

Balanced compound NPK, every granule the same analysis

A compound NPK is a manufactured granule in which every particle carries the declared nitrogen, phosphate and potash, as distinct from a bulk blend, which is a physical mix of separate granules that can segregate. 15-15-15 is the reference grade, sold on total N 15%, available P₂O₅ 15% of which a stated fraction is water-soluble, K₂O 15%, moisture at 1.5–2% maximum and size 2–4 mm; the same plants make 16-16-16, 17-17-17, 20-10-10, 12-24-12, 20-20-0 and chloride-free or sulphur-added variants. What separates good compound from bad is the nitrogen form (ammoniacal, nitrate or urea, which behave differently in soil and are declared on a proper certificate), the water-solubility of the phosphate, hardness and dust, and whether the potash is from muriate or sulphate. A 'compound' that is a coated blend of DAP, urea and MOP granules is a different, cheaper product and should be sold as one.

Buy compound NPK where an even application of all three nutrients matters and the farmer cannot blend: smallholder agriculture across Africa and Asia, government and cooperative tender programmes, rice and maize basal dressing, plantations, and horticulture. Buy separate straights and blend where the buyer has blending capacity, because the straights are cheaper per unit of nutrient. Compound NPK moves in Handysize and Supramax bulk parcels from China, Europe, Morocco and the Gulf, and very largely in 50 kg bags into tender markets, where bag print, weight tolerance and packing certificates are contractual. CBIL brokers compound NPK grades against independent certification of N (by form), available and water-soluble P₂O₅, K₂O, moisture, size and bag weight at load, in bulk and 50 kg bags, on FOB, CFR and CIF terms.