UAN 28 — Liquid Nitrogen for Fertigation & Side-Dress
Urea-ammonium nitrate at 28% total nitrogen delivers three nitrogen forms in a single solution, giving immediate nitrate uptake plus sustained ammonium and urea release. The 1.27 g/cm³ density suits storage in on-farm tanks and direct injection through pivot and drip systems. Popular for corn sidedress in North America and greenhouse fertigation in the Mediterranean. Minimum contract 1,000 MT in bulk tanker, ISO tank or bagged concentrate.
Product Data
- FOB
- CFR
- CIF
- Agriculture
- Blending
- Fertigation
Storage & Handling
UAN 28 must be stored above −18°C to prevent salt crystallization; heated tank farms or insulated ISO tanks are standard for winter transit. Compatible with most NPK tank mixes at dilution — avoid mixing with high-calcium or high-phosphate solutions without jar testing. Bulk ISO tank shipments of 20–25 MT per unit; larger parcels by chemical tanker from 1,000 MT. FOB load port or CFR/CIF to destination tank terminal.
FAQ
What nitrogen forms are present in UAN 28?
UAN 28 contains approximately 7% urea-N, 7% ammonium-N and 14% nitrate-N, totalling 28% minimum total nitrogen. The nitrate fraction provides immediate plant availability; urea and ammonium extend the feeding period over 2–4 weeks.
Can UAN 28 be applied through centre-pivot irrigation?
Yes. UAN 28 is the standard liquid nitrogen source for pivot injection in maize and sorghum. Injection rates of 100–200 kg N/ha per pass are typical; dilute with irrigation water to avoid foliar burn on leaf contact.
Does UAN 28 require special transport classification?
UAN solutions below 35% N are generally classified as non-hazardous fertilizer liquids in most jurisdictions, but transport rules vary by country. We provide SDS and IMO classification documentation with each shipment for customs and port clearance.