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Teacher Information!

Teacher Information!. PowerPoint begins with teacher-led discussion (on next slide) Necessary materials: PowerPoint Guide. Teacher-Led Discussion. What is runoff ? Why is runoff a problem? What tactics are used to lessen the impacts or runoff?. Controlling Erosion on the Farm.

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Teacher Information!

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  1. Teacher Information! • PowerPoint begins with teacher-led discussion (on next slide) • Necessary materials: • PowerPoint Guide

  2. Teacher-Led Discussion • What is runoff? • Why is runoff a problem? • What tactics are used to lessen the impacts or runoff?

  3. Controlling Erosion on the Farm Pgs 67-77 in Ch.6 of Managing Our Natural Resources Soil and Water Resources

  4. Students will be able to… • Discuss the different methods that farmers can use to control erosion. • Identify the most important factor of erosion control

  5. Erosion Control Methods (1) • Cover crops • Close-growing crops protect soil • Common in vineyards and orchards • Used when erosion danger is severe • Improve organic matter content • Green manure crop • Cover crop is plowed under

  6. Erosion Control Methods (2) • Crop rotation • Decreases erosion danger • Improves water absorption • Increases soil organic matter content • Examples: • 3-year rotation  corn, soybeans**, wheat • 4-year rotation  corn, cotton, oats, hay • **Benefits of legumes?

  7. Erosion Control Methods (3) • Strip cropping • Alternating bands of different crops • Corn-hay-corn-hay • Used in conjunction with crop rotations • Provides strip of heavier vegetation • Advantages?

  8. Erosion Control Methods (4) • Grassed waterways • Drainage ditch covered with dense vegetation • Widely used throughout world • NOT cultivated • Grass may be used for hay

  9. Erosion Control Methods (5) • Conservation tillage • To till… • Economical • Conserves soil and water • All rely on crop residue to protect soil • Examples? • Disadvantages v. advantages?

  10. Erosion Control Methods (6) • Contour farming • Don’t go up the hill…go around! • Why? • Exactly perpendicular? • No… • Disadvantage?

  11. Erosion Control Methods (7) • Terracing • Large surface channels • Controlled rate of fall • Conduct water to a protected area • Use when slopes are greater than 2%

  12. Controlling Wind-Caused Erosion • Windbreaks • Often for sheltering buildings • Reduce cost of heating/cooling • Slows moisture evaporation • Shelterbelts • Provide shelter for crops and livestock • Conservation tillage • Contour farming

  13. EROSION! • What is the most important thing that can be done? • Use the land according to its CAPABILITY! • Then make use of appropriate erosion control methods.

  14. Can you… • Identify the different methods that farmers can use to control erosion in the following slides?

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