dust bowl what are 3 natural causes of the dust bowl? what are 2 man made causes of the dust bowl?
TRANSCRIPT
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Dust Bowl
• What are 3 natural causes of the dust bowl?
• What are 2 man made causes of the dust bowl?
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What is this agricultural device?
1. What is one advantage of using this device?
2. Why was it so important to early Kansas farmers?
3. Is there a reason this device could have hurt the farmers business?
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Plow
• Allowed farmers to plant crops on land that was covered with natural grasses.
• Allowed farmers to grow crops as surplus.
• Led to great amounts of soil erosion.
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Crop Rotation: Changing the crops grown in a field, usually in
a planned sequence.
• 4. What crops do you think are rotated in Kansas today?
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• 5. What do you think the purpose of this row of trees is?
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Shelterbelt
• windbreak: hedge or fence of trees designed to lessen the force of the wind and reduce erosion
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Stubble mulch
• Tillage or preparation of the soil in such a way that plant residues or other materials are left to cover the surface
6. How do you think this different from plowing?
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Terracing and Contour farming
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Terracing
• Creating ditches that run with the contour of the land.
• How do you think terracing help prevent soil erosion?
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• 7. What is this called? (hint: not crop circles)
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Irrigation
• Keeps soil moist, allows crops to grow better
• Keeps soil from blowing away
• 8. Can you think of a drawback to using irrigation?
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We are going to read this article in class as a group and I want you to
tell me what current farming technique is being used by many
farmers today in Kansas.
• http://www2.ljworld.com/news/2005/jan/25/landowner_relies_on/