CF Industries Holdings, Inc. (CF) and POET LLC, the world's largest producer of biofuel and a global leader in sustainable bioproducts, announced a partnership to test the use of low-carbon ammonia fertilizer to reduce the carbon intensity of corn production and ethanol. Demand for lower-carbon ethanol is likely to rise considerably to fulfill low-carbon fuel standards.Although ammonia is a popular direct-application fertilizer for corn production in the United States, the traditional ammonia production pro ...