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Soil Formation
| Term | Definition |
|---|---|
| Soil | A loose mixture of rock fragments, organic material, water, and air that can support the growth of vegetation. |
| Parent Rock | The rock formation that is the source of mineral fragments in the soil |
| Bedrock | The layer of rock beneath the soil |
| Residual soil | The soil that remains above its parent rock |
| Transported soil | |
| Loam | Soil that is made up of about equal parts of clay, sand, and silt |
| Soil composition | A mixture of rock particles, minerals, decayed organic material, water, and air |
| Humus | A dark colored substance that forms as plant and animal remains decay |
| Nutrients | Humus contains substances called |
| Fertile soil | Rich in the nutrients that plants need to grow |
| Soil texture | The soil that is based on the proportions of soil particles |
| Infiltration | Ability of water to move through soil |
| Soil structure | The arrangement of soil particles |
| Soil horizons | Soil develops layers called |
| Horizon A | A crumbly, dark brown soil that is a mixture of humus, clay, and other minerals |
| Horizon B | Usually consists of clay and other particles washed down from horizon A |
| Horizon C | Contains solid to partly weathered rock |
| Soil Mixers | Earthworms and burrowing animals break up hard compacted soil and mix humus through it |
| Soil | A loose mixture of rock fragments, organic material, water, and air that can support the grow of vegetation |
| Parent Rock | The rock formation that is the source of mineral fragments in the soil |
| Bedrock | The layer of rock beneath the soil |
| Residual soil | The soil that remains above its parent rock |
| Transported Soil | Soil that is blown, washed away, or moved by glaciers |
| Soil composition | A mixture of rock particles, minerals, decayed organic material, water, and air |
| Humus | A dark-colored substance that forms as plant and animal remains decay |
| Decomposition | Humus forms in a process called |
| Nutrients | Humus contains substances called |
| Fertile soil | Rich in nutrients that plants need to grow |
| Soil texture | The soil quality that is based on proportions of soil particles |
| Loam | Soil that is made up of about equal parts of clay,sand, and silt |
| Infiltration | Ability of water to move through soil |
| Soil Structure | The arrangement of soil particles |
| Soil horizon | A layer of soil that differs in color and texture from the layers above or below it |
| Horizon A | A crumbly, dark brown soil that is a mixture of humus, clay, and other minerals |
| Horizon |
Created by:
Owen.walls