Understanding Soil Erosion and Conservation in 6th Grade Science
Soil erosion is the process of soil wearing away, commonly caused by natural forces like wind, water, gravity, and ice, as well as human activities such as farming, mining, and construction. Severe weather events can accelerate soil erosion. Soil conservation techniques like crop rotation, conservation tillage, terraces, contour plowing, and windbreaks can help prevent soil erosion and preserve this essential natural resource.
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Presentation Transcript
Soil Erosion The wearing away of soil Loss of soil
Natural Causes of Soil Erosion: Wind Water (rain) Gravity (hills, mountains) Ice (glaciers, cold temperatures)
Other Causes of Soil Erosion: Farming Mining Construction
Severe weather speeds up soil erosion! Storms Tornados Floods
Soil Conservation: Ways to preserve (or save) the soil
1. Crop Rotation Planting different crops on the same field in different years http://t2.gstatic.com/images?q=tbn:jC7yjzfxn9PXgM:http://www.worldcommunitycookbook.org/season/guide/photos/corn.jpg http://t2.gstatic.com/images?q=tbn:T9Rm_FsJHYFuoM:http://www.salmonellablog.com/tomatoes_lead_narrowweb__300x3070.jpg http://t1.gstatic.com/images?q=tbn:o2l93E9qYfzxIM:http://www.egytex.com/news/images/news/cotton1-(1254645310).jpg
2. Conservation Tillage Reducing the number of times fields are tilled, or plowed, in a year
3. Terraces Flat, step-like areas built on a hillside to prevent rainwater from running downhill
4. Contour Plowing Plowing along curves or contours of a slope to prevent water from running straight downhill http://t1.gstatic.com/images?q=tbn:lDCJEEtGM_9kmM:http://gis.lrs.uoguelph.ca/AgriEnvArchives/pics/contour_plowing.jpg http://t1.gstatic.com/images?q=tbn:FXhZa35MOmkJNM:http://dnr.wi.gov/wnrmag/html/images/photo/2003/jun03/8.jpg
5. Wind Breaks Rows of trees between fields to break or reduce the force of winds. http://t3.gstatic.com/images?q=tbn:ZGAHlVoBp8ufPM:http://upload.wikimedia.org/wikipedia/commons/0/00/FieldWindbreaks.JPG http://t0.gstatic.com/images?q=tbn:acUwo0yFD70bTM:http://davidwallphoto.com/images/%257B15688052-3DF9-4971-B88B-C8910DD523CD%257D.jpg
Soil Conservation Examples Find a partner. Read the scenario of erosion. With your partner, decide on a solution to the problem. Write your solution next to the scenario and then draw a picture of your solution.
