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9 Cards in this Set
- Front
- Back
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soil |
the portion of the earth's surface consisting of disintegrated rock and humus. |
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bedrock |
Geology. unbroken solid rock, overlaid in most places by soil or rockfragments. |
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humus |
the dark organic material in soils, produced by the decomposition of vegetable or animal matter and essential to the fertility of the earth. |
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fertility |
the state or quality of being fertile. |
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loam |
a rich, friable soil containing a relatively equal mixture of sand and silt and a somewhat smaller proportion of clay. |
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soil horizon |
the line or circle that forms the apparent boundary between earth and sky. |
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topsoil |
the fertile, upper part of the soil. |
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subsoil |
the bed or stratum of earth or earthy material immediately under the surface soil. |
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decomposer |
a person or thing that decomposes. |
