- McLean County Historical Society, Bloomington, Ill
- University of Illinois at Urbana-Champaign, University Library
Cattle are stored in pens at the Chicago stock yards. In the late 1800s, some farmers worried that the rich soil in McLean County had become depleted. To compensate, they imported manure by rail from the Chicago stock yards to fertilize cornfields. How we learn about communities; Communities and Geography; American Communities in History. 15 Economics; 16 History; 18 Social systems.
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