PowerPoint - Soil Conservation Methods
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Transcript of PowerPoint - Soil Conservation Methods
![Page 1: PowerPoint - Soil Conservation Methods](https://reader033.fdocuments.in/reader033/viewer/2022061112/54569392b1af9fcb1e8b4901/html5/thumbnails/1.jpg)
SOIL CONSERVATION
Form 2
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Objectives
• Define the terms – soil erosion – soil conservation
• Recognize signs of soil erosion
• Discuss methods of soil conservation
• Say why it is important to conserve soil
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Key Terms
• Soil erosion - removal of topsoil faster than the soil forming processes can replace it, due to natural, animal, and human activity (over grazing, over cultivation, forest clearing, mechanized farming, etc.).
• Soil conservation - the prevention or reduction of soil erosion and soil depletion by protective measures against water and wind damage
![Page 4: PowerPoint - Soil Conservation Methods](https://reader033.fdocuments.in/reader033/viewer/2022061112/54569392b1af9fcb1e8b4901/html5/thumbnails/4.jpg)
Signs of Soil Erosion
• Muddy water• shallow furrows• gullies• dams filled with mud• uneven growth• bare ground• deep cattle tracks• standing stones• uncovered roots• dust clouds• walls splashed with mud
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Soil Conservation Methods
• Terracing
• Contour Ploughing
• Contour Strip Cropping
• Cover Crop
• Windbreaks
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Terracing
• Building up walls of land (that resemble steps) to counter the effect of a mountain slope leaving uniform flat surfaces to plant on.
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Contour ploughing
• A method of ploughing parallel to the contours rather than up or down a slope
• each furrow acts as a dam preventing water flowing downhill
• plants are planted along contours
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Contour Strip Cropping
• alternate strips of crops are planted along contours of sloping hillsides
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Cover Crops & Windbreaks
• Cover crops– reduces force with
which rain drops hit ground (splash effect)
• Windbreaks– belts of trees and
bushes to break the force of the wind
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Importance of Soil Conservation
• Soil erosion results in land infertility and leads to desertification and devastating flooding.
![Page 12: PowerPoint - Soil Conservation Methods](https://reader033.fdocuments.in/reader033/viewer/2022061112/54569392b1af9fcb1e8b4901/html5/thumbnails/12.jpg)
Recap
• How many of these questions can you answer?1) The washing away of the Earth's topsoil is
known as ____________.
2) ____________ refers to protective measures for reducing soil erosion & depletion.
3) Three soil protective measures are ______, ________ & _______.
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Information Sources include:
• http://pdsblogs.org/pdsapes812/2012/03/05/soil-degradation-and-conservation-scribe-post/