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9 Cards in this Set
- Front
- Back
sod
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The thick mass of tough roots at the surface of the soil.
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renewable resource
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A resource that is naturally replaced in a relatively short time.
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Dust Bowl
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An area where wind erosion caused severe loss of topsoil during the 1930's.
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soil conservation
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The management of soil to prevent its destruction.
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contour plowing
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The practice of plowing fields along the curves of a slope.
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conservation plowing
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A method of plowing where the soil and its plant cover is disturbed as little as possible.
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Explain the importance of soil as one of Earth's resources.
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Everything that lives on land depends directly or indirectly on soil.
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How did settlers on the great Plains help create the Dust Bowl?
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Plowing removed the grass from the Great Plains and exposed the soil. In times of drought, the topsoil quicly dried out, turned to dust, and blew away.
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What are some techniques that farmers use to conserve soil?
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a. contour plowing
b. conservation plowing |