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What a soil does

Last week featured an extremely condensed version on the formation of soils. Now let’s briefly examine the roles of soil in our world. First, broad definitions of the soil are helpful. Soil can be defined as the skin of the earth or the area of exchange between the earth and the atmosphere. The soil is also defined as a dynamic, living organism consisting of organic and inorganic components. While soil profiles (the vertical extent of the soil) vary in depth from inches to over ten feet, let’s assume a depth of 3 feet. The distance from the earth ...


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