a portable , self - contained system for producing nitric acid from a supply of electricity and water , incorporates a nitrogen generating unit including a cabinet enclosing a manifold defining a plurality of series connected air combustion chambers each having one electrode concentric within a restricting orifice defined by a second electrode . the unit also includes an air compressor for supplying air which spirals through each combustion chamber to rotate the arc within the orifice , and each combustion chamber is exposed for viewing through a corresponding lens . the system also incorporates a liquid fertilizer generator unit including a closed plastic tank containing water and a submersible pump which recirculates the water through an aspirator where nitrogen gas is introduced into the water and then through a long plastic absorption tube coiled within the tank . the compressor also supplies additional oxygen to the tank for further converting nitrous oxide to nitric acid .