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Five factors that influence soil formation

Five factors that influence soil formation - Five factors...

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Five factors that influence soil formation: 1. Climate - warmth speeds chemical reactions, causes weathering. Moisture also causes weathering 2. Organisms - earthworms and burrowing animals mix and aerate the soil, also add organic matter 3. Topographical relief - hills and valleys affect sun exposure and influence how the soil moves 4. Parent material - chemical and physical properties of the parent materials influences the resulting soil 5. Time - soil formation can take decades, centuries or millenia Soil consists of layers called horizons - 6 horizons O- top layer of organic material A- second layer - inorganic material mixed with some organic material from top layer - this is the topsoil E- loses some minerals and organic matter through leaching B- subsoil accumulates minerals from above this layer also called illuviation horizon, zone of accumulateion or zone of deposition C- parent material leaching - solid particles are suspended or dissolved in liquid and transported to another location (water leaches minerals from soil)
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  • Spring '08
  • DORALE
  • Organic matter, Soil Conservation Service, water soil PH, erosion desertification salinization, water soil structure

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