The present inventionprovides methods and apparatus for thepreparation of nitrogen fertilizers includingammonium nitrate, urea, urea-ammoniumnitrate, and/or ammonia, at low temperatureand pressure utilizing a source of carbon, asource of nitrogen, and/or a source of hydrogenor hydrogen equivalent. Implementingelectrolyte serving as ionic charge carrier, (1)ammonium nitrate is produced via reductionof nitrogen source at the cathode and oxidationof nitrogen source at the anode； (2) urea orits isomers are produced via simultaneouscathodic reduction of carbon source andnitrogen source； (3) ammonia is produced viareduction of nitrogen source at the cathode andoxidation of hydrogen source or a hydrogenequivalent such as carbon monoxide or amixture of carbon monoxide and hydrogen atthe anode； and (4) urea-ammonium nitrate isproduced via simultaneous cathodic reductionof carbon source and nitrogen source, andanodic oxidation of nitrogen source.
