- McLean County Historical Society, Bloomington, Ill; Walters, William D, Jr., 1942-
- University of Illinois at Urbana-Champaign, University Library
A farmer wearing a blue shirt and khaki pants checks a stalk of corn in a field. Farmers often would dig up random stalks of corn to check the root system and the nature of the plant to gauge how their crop was doing. How we learn about communities. 16 History; 13 Science, Technology and Society; 15 Economics; 18 Social Systems.
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