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10 Cards in this Set
- Front
- Back
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soil |
the loose weathered material on earth's surface
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Beadrock |
the solid layer of rock beaneath the soil |
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Humus |
a dark-collred substance that forms as plant and animal decay |
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fertility |
a measure of how well the soil supports plant growth |
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loam |
the best soil for growing most plants |
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pH scale |
measures acidity |
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soil horizon |
a layer of soil that differs in color, texture and composition
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topsoil |
a crumbly dark brown soil that is a mixture of humus clay and other minarals |
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subsoil |
clay and other particles of rock but little humus |
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Decomposer |
organisms that break the remains of dead organisms into smaller pieces. |
