Liquid Nitrogen 28-0-0 UAN Calculator
Calculate 28-0-0 UAN liquid nitrogen gallons per acre from a target nitrogen rate, using the solution density and analysis for accurate rate math.
How This Calculation Works
Product pounds per acre equals the target nitrogen rate divided by the analysis percentage, times 100. For 120 pounds of nitrogen per acre from 28-0-0, that is about 429 pounds of UAN per acre. Dividing by the 10.67 pound-per-gallon density gives about 40 gallons of UAN per acre.
Field Calibration & Rate Reference Chart
| Analysis | Nutrient % | Target lb/ac | Product lb/ac |
|---|---|---|---|
| 46-0-0 Urea | 46 | 100 | 217 |
| 46-0-0 Urea | 46 | 120 | 261 |
| 34-0-0 AN | 34 | 100 | 294 |
| 28-0-0 UAN | 28 | 120 | 429 |
| 18-46-0 DAP | 46 | 60 | 130 |
| 11-52-0 MAP | 52 | 60 | 115 |
| 0-0-60 Potash | 60 | 80 | 133 |
| 10-10-10 | 10 | 60 | 600 |
| 19-19-19 | 19 | 80 | 421 |
| 6-4-0 Milorganite | 6 | 48 | 800 |
Common Questions
How many gallons of 28-0-0 UAN give 120 pounds of nitrogen per acre?
Divide 120 by 0.28 to get about 429 pounds of UAN per acre, then divide by 10.67 pounds per gallon to get about 40 gallons per acre. The density converts weight to volume. Multiply by acres for the field total.
What is the density of 28-0-0 UAN?
28-0-0 UAN weighs about 10.67 pounds per gallon at 60 degrees Fahrenheit. Density rises slightly as the solution cools. Use the supplier's figure for accurate rate calculations.
At what temperature does UAN salt out?
28-0-0 UAN begins to crystallize around 32 degrees Fahrenheit, and the risk rises as the concentration increases. Keep storage and application equipment above that temperature. Cold solution also flows differently, so recalibrate.
How do I reduce nitrogen loss from surface-applied UAN?
Place the UAN below the residue with stream bars, coulters or injection, or apply before a rain. A urease inhibitor slows the conversion of urea to ammonia. Surface broadcasting on warm, high-residue ground loses the most nitrogen.