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10 Cards in this Set
- Front
- Back
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soil |
The loose, weathered material on Earth's surface in which plants can grow.
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bedrock
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The solid layer of rock beneath the soil.
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humus
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Dark colored organic (once living) material in soil.
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fertility
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A measure of how well soil supports plant growth.
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loam
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Rich, fertile soil that is made up of about equal parts of clay, sand, and silt.
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soil horizon
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The layer of soil that differs in color and texture from the layers above or below it.
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topsoil
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Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
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subsoil
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The layer of soil beneath the topsoil that contains mostly clay and other minerals.
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Soil texture is identified by using: |
Grain size |
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Smallest grain size: |
Sand |
