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Understanding Frost Heaves: Formation and Impact

Learn about frost heaves, no-tilling farming, soil formation, The Dust Bowl, and more in Chapter 9. Discover why soil degradation occurs and the consequences of historical events like the Irish Potato Famine.

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Understanding Frost Heaves: Formation and Impact

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Presentation Transcript

  1. Do now – Question • With winter coming you will see signs for Frost heaves. What are they and how are they formed?

  2. Reminder of Homework • You should be done reading chapter 9 • Monday – FCA essay on Global Climate Change – Handout. • Posted on Wiki site

  3. Quick Review • Transition Demographics – explain the chart below. Please write out your answer(s).

  4. New material – Chapter 9 • No-tilling farming • What is it and why is important? • Agriculture vs. Cropland vs. Rangeland • How and why soil gets degraded • How and why did agriculture come to be?

  5. New material – Chapter 9 • No-tilling farming vs. tilling

  6. New material – Chapter 9 • Cropland

  7. New material – Chapter 9 • Rangeland

  8. New material – Chapter 9 • Soil formation: • Parent material • Bedrock • Weathering of the rock • Physical versus chemical • Soil profile - Horizontal

  9. New material – Chapter 9 • Weathering of the rock • Physical versus chemical

  10. New material – Chapter 9 • Soil profile – Horizontal • O Horizon, then A, E, B, C, R • Topsoil vs. clay • Page 230 (top of page) • Land degradation and erosion • Desertification • The dust bowl

  11. New material – Chapter 9 • Soil formation:

  12. New material – Chapter 9 • The Dust Bowl • How did this happen and when?

  13. New material – Chapter 9 • Traditional agriculture • Monoculture – give an example and give an example of how or when it failed. • In the 1840’s, the Irish Potato Famine hit. What was the impact? • Population shift? Political? Cultural?

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