- McLean County Historical Society, Bloomington, Ill; Walters, William D, Jr., 1942-
- University of Illinois at Urbana-Champaign, University Library
In 1995, a tractor attached to an automated corn planter seeds a field. Bags of Ciba seed are used. Today, automation is a main key of farming. Technology allows precise planting without missing rows in ways it could not do 100 years ago when the first planters were invented. How we learn about communities. 16 History; 13 Science, Technology and Society; 15 Economics; 18 Social Systems.
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