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  3. Windbreaks Farmers use different kinds of soil conservation methods to protect their land against damage from farming and th

Windbreaks Farmers use different kinds of soil conservation methods to protect their land against damage from farming and th

admin2014-03-21  98
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答案 Windbreaks Farmers use different kinds of soil conservation methods to protect their land against damage from farming and the forces of nature./ One important form of soil conservation is the use of windbreaks. / Windbreaks are barriers formed by trees and other plants with many leaves. / Farmers plant them in lines around their fields. / Windbreaks stop the wind from blowing soil away. / They also keep the wind from destroying or damaging crops./ They are very important for growing grains, such as wheat. / Windbreaks can help protect a farmer’s land./ However, / windbreaks seem to work best when they allow a little wind to pass through. / If the wall of trees and plants blocks the wind completely, / then violent air motions will take place close to the ground. / Theses motions cause the soil to lift up into the air where it will be blown away. /
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