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Soil is essential for life. It is the top cover of the earth and home to numerous plants and animals. In addition, it is a very important food and mineral resource for humans. The soil covering the surface of the earth has taken millions of years to form. Soil appears to last forever, but every day soil particles are loosened by a process called erosion. Erosion is the displacement of solid particles from land, rocks, and minerals by the agents of water, ice, wind, and or gravity causing the soil to deteriorate. This process must be distinguished from weathering, which is the process of disintegration of soil and rock through direct or indirect contact with the atmosphere.

One of the most important types of soil ...

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