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10 Cards in this Set
- Front
- Back
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soil
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The loose material where plants can grow in the upper layer of Earth
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humus
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The part of the soil made up of decayed parts of once-living things
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topsoil
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top layer of soil made of smallest grains and the most humus
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bedrock
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the solid rock that is under soil
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clay
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soil made of very small grains; it holds water well
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loam
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topsoil rich in minerals and lots of humus
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resource
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a natural material that is used by living things
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conservation
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saving resources by using them carefully
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strip cropping
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strips of thick grass between strips of crops
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contour plowing
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rows of crops around the sides of hill
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