The Illinois Central discontinued the Land O'Corn in 1967; Amtrak later operated the Black Hawk over part of its route.

Material shortages caused by World War II prevented ACF from building a replacement so the Illinois Central began operating regular steam-pulled coaches over the schedule.

[3]: 48 [5]: 623  The Illinois Central re-equipped the Land O'Corn with diesel-pulled lightweight equipment on February 12, 1947, although steam engines continued to substitute well into the 1950s.

[3]: 64  The train's new consist was four 56-seat lightweight coaches built by Pullman-Standard (part of a larger order which reequipped the City of New Orleans and Green Diamond) and a heavyweight cafe/lounge.

[2]: 98 Amtrak revived service over part of the Land O'Corn's route 1974–1981 when it operated a train between Chicago and Dubuque, Iowa.