UAN is a solution of urea and ammonium nitrate in water used as a fertilizer. The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers.

Historische Bemerkungen zur chinesischen Instrumentenbaukunst der T'ang, II —Addenda zur Zitherbauerfamilie Lei in Szu-ch'uan—
The UAN: a user-oriented representation for direct manipulation interface designs
Underwater Acoustic Networks: The FP7 UAN Project
Seismotectonic study by relocation of the Wench uan M_S 8.0 earthquake sequence
Prediction of NO3-N losses with subsurface drainage water from manured and UAN-fertilized plots using GLEAMS.
The MIQE Guidelines: inimum nformation for Publication of uantitative Real-Time PCR xperiments
Hysterectomy rates in the United States 1990-1997.
On the data reuse and memory bandwidth analysis for full-search block-matching VLSI architecture
LOX1 mediates oxidized LDL-induced the expression of matrix metalloproteinases in human coronary artery endothelial cells
Age is a better predictor of pregnancy potential than basal follicle-stimulating hormone levels in women undergoing in vitro fertili...