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Weathering/Erosion
Soil Formation neumeyer6
Term | Definition |
---|---|
Bedrock | solid layer of rock beneath loose soil, once exposed bedrock gradually weathers in smaller particles that are basic material of soil. |
Soil | loose mixture of rock particles, minerals, decayed organic material, air, water in witch plants can grow. |
Humus | Dark colored substance in soil from the decayed organic material. |
Fertility | Measures how well the soil supports plant growth. |
Loam | Soil that is made up of equal parts of clay, sand , and silt. Best for growing most types of crops. |
Soil horizon | soil that differs in the color and texture from the layers above and below it. |
Top soil | The A horizon or the top layer, it is crumbly dark brown mixture of humus, clay and other minerals. |
Sub soil | The B horizon below the top soil consisting of clay and other particles washed down from the top soil, but little humus . |
Sea horizon | The bottom layer containing partly weathered rocks. |
Soil conservation | Management of soil to prevent its n distruction. It can be conserved threw the following. |
Contour plowing | Farmers plow the fields along the curbs of the slopes to help slow runoff or access rain fall witch may wash away soil. |
Conservation plowing | Farmers leave dead weeds and stalks of previous years crops to return all the nutrients to soil, helps return moisture and holds soil in place |
Croprotation | Farmers plant different crops in each field each year. |