"THE nitrogen fixation plants built by the government during the great war at a cost of about one hundred million dollars, to supply materials needed for making explosives and poisonous gases, had been idle since the Armistice. These plants could be utilized, whether sold to private corporations or operated by the government for the fixation of atmospheric nitrogen for industrial and agricultural purposes, and thus greatly increase the supply of nitrogen compounds needed in the industries, and stimulate the production of food through supplying nitrogen for the manufacture of fertilizer. The present anomalous situation in the government plants gives occasion for a survey of the remarkable chemical developments of recent years and of their importance for war and for peace. Nitrogen, tho the most important element needed for an adequate supply of fertilizer, is not the only one essential. Two others are also important: potash and phosphoric acid. All must be chemically combined in such a way as to be available as plant food. Before the outbreak of the war potash was contained entirely from Germany, at a price maintained substantially above the cost of production by a German monopoly. Exports from Germany ceased early in 1915, and prices in the United States promptly rose to about ten times normal. Existing stocks were thereafter largely diverted to chemical uses, and relatively insignificant amounts were used in fertilizer from 1916 up to and including 1919."