character: Southern Farmers
topic: Changes in Farming Practices Due to Inventions
grade: 4
subject: Social Studies
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character: Eli Whitney
topic: Cotton Gin and its Impact on Farming
grade: 4
subject: Social Studies
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character: John Deere
topic: The Invention of the Steel Plow
grade: 4
subject: Social Studies
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character: Samuel Morse
topic: Telegraph and Communication in Farming
grade: 4
subject: Social Studies
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