- McLean County Historical Society, Bloomington, Ill
- University of Illinois at Urbana-Champaign, University Library
When grain elevators and silos were full due to a bumper crop or better technology, excess corn would sometimes be piled on the ground for temporary storage. Corn yields increased rapidly in the 1950s and 1960s. Even high-rise reinforced concrete elevators cannot always handle the crop. How we learn about communities. 13 Science, Technology and Society; 15 Economics; 16 History.
- For any further information related to this record, please contact the Collection Publisher. See http://images.library.uiuc.edu/projects/tdc for more information about this project.