10-22 - Soil Formation Soil forming processes Soil forming...

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Soil Formation Soil forming processes Soil forming factors o Climate o Organisms o Parent material o Topography o Time Soil Formation Processes Leads to horizon development Thicker soil Additions of material to the profile Additions of nutrients to the soil 1. Weathering – most fundamental supply 2. Atmospheric deposition- minor, aka dust 3. Decomposition- ongoing addition of organic material. As organic material breaks down it oxidizes it and adds water vapor and releases nutrients as they decompose 4. Sediment deposition- adding material on soil surface: often time with flooding 5. Humans- fertilization: add productivity Losses of nutrients from the soil 1. Erosion- physically picking it up and transporting it or removing it 2. Leaching- downward movement of dissolved material from the profile. Can get replaced by H ions, which reduces the pH to make soil more acidic. Acting on mineral material. 3. Atmospheric volatilization- fire. Loss to atmosphere.
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This note was uploaded on 01/17/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at University of Georgia Athens.

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10-22 - Soil Formation Soil forming processes Soil forming...

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