Rohweder, Shrader, and Templeton (1977) found that corn grown in a rotation that included a legume sod always outyielded continuous regardless of how much nitrogen was applied. First year corn following alfalfa and without any nitrogen fertilizer applied yielded as much as corn fertilized with 168 kg N/ha (150 lb N/ac). In the second year of corn after 84 ha (75 lb N/ha) was needed for the corn to equal the yield obtained with 168 kg N/ha (150 lb ac). By the third year of corn in the rotation, the amount of nitrogen required for equal yield was about the same as that for continuous corn. The total nitrogen equivalent produced by the full stand of alfalfa in these rotations was 252 kg/ha (225 lb N/ac).