1. Change Over Time Farming with the Plow Grade 3, Unit: 07 Lesson: 01
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Grade 3 Unit 7, Lesson 01

2. Plowing with oxen
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3. Simple “one row at a time” plow
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4. Image from: http://www.okgenweb.org/~okgreer/brnkfarm.html
Plowing with a horse
Image from:
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5. Finally! Plows on wheels to help horses go faster.
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6. One of the first tractors
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7. Modern day tractors can plow up to 20 rows at a time!
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8. Close up of the modern plow.
©2012, TESCCC