A summary of yield data comparing different nitrogen fertilizer sources in field experiments conducted by the Agronomy Department staff should provide information that will help answer some of the inquiries regarding the comparative value of some of the nitrogen fertilizers being marketed in Kentucky. Since the nitrogen rates per acre shown in all tables are ACTUAL NITROGEN the COST PER POUND OF NITROGEN in the different materials is an important consideration when evaluating the various products.
Wells, Kenneth L.; Murdock, Lloyd W.; and Miller, Harold F., "Comparisons of Nitrogen Fertilizer Sources under Kentucky Soil and Climatic Conditions" (1976). Agronomy Notes. 120.