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Published byAmie Griffin Modified over 9 years ago
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PowerPoint begins with teacher-led discussion (on next slide) Necessary materials: PowerPoint Guide Teacher Information!
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What is runoff? Why is runoff a problem? What tactics are used to lessen the impacts or runoff? Teacher-Led Discussion
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Controlling Erosion on the Farm Soil and Water Resources Pgs 67-77 in Ch.6 of Managing Our Natural Resources
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Students will be able to… Discuss the different methods that farmers can use to control erosion. Identify the most important factor of erosion control
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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 Erosion Control Methods (1)
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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? Erosion Control Methods (2)
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Strip cropping Alternating bands of different crops Corn-hay-corn-hay Used in conjunction with crop rotations Provides strip of heavier vegetation Advantages? Erosion Control Methods (3)
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Grassed waterways Drainage ditch covered with dense vegetation Widely used throughout world NOT cultivated Grass may be used for hay Erosion Control Methods (4)
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Conservation tillage To till… Economical Conserves soil and water All rely on crop residue to protect soil Examples? Disadvantages v. advantages? Erosion Control Methods (5)
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Contour farming Don’t go up the hill…go around! Why? Exactly perpendicular? No… Disadvantage ? Erosion Control Methods (6)
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Terracing Large surface channels Controlled rate of fall Conduct water to a protected area Use when slopes are greater than 2% Erosion Control Methods (7)
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Windbreaks Often for sheltering buildings Reduce cost of heating/cooling Slows moisture evaporation Shelterbelts Provide shelter for crops and livestock Conservation tillage Contour farming Controlling Wind-Caused Erosion
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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. EROSION!
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Can you… Identify the different methods that farmers can use to control erosion in the following slides?
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