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Unveiling Earth's Skin: The Essentials of Soil Science

Explore the intricate world of soils and regolith through the lens of pedology, studying the formation, horizons, and orders of soils. Delve into the impact of CLORPTH factors on pedogenic processes, the significance of soil degradation like the Dust Bowl, and the dynamic interplay of climate, organisms, relief, parent material, time, and human influences on soil health. Uncover the importance of soils as a non-renewable resource crucial for life on Earth, highlighting their role in chemical weathering and global soil distribution across major terrestrial biomes.

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Unveiling Earth's Skin: The Essentials of Soil Science

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  1. Soils and Regolith

  2. Pedology- The study of soils • Pedogenic processes depend on: ClORPTH • Climate - Temperature, H2O, freezing • Organisms - Addition and digestion of Org. Material • Relief - Slope Steepness - Balance with erosion • Parent Material - what do you start with? • Time - How long has it been sitting there? • Humans - Addition of fertilizer, tillage, salinization, etc… FLUX SITE

  3. The importance of soils • Life on Earth depends on soil • Soil is a vital non-renewable resource • It takes > 1000’s of years to form a soil • Chemical weathering happens in soils

  4. Soil Degradation (erosion)

  5. The Dust Bowl

  6. Soil Horizons E/A2

  7. Soil Formation

  8. Clay Formation in Soils Primary 2:1 1:1 0:1

  9. Some Soil Profiles Oxisol Alfisol Aridisol

  10. Soil Water

  11. Climate and Organisms

  12. Relief

  13. Parent Material

  14. Time

  15. Naming Soils • Soils are named on the basis of Subsurface horizons • Layers in the soil that reflect soil forming processes

  16. Soil Orders • Alfisols - Moderate temperature forests • Andisols - Soils on volcanic material • Aridisols - Soils from deserts • Entisols - Little soil formation • Gelisols - Soils in cold regions w/ permafrost • Histisols - Soils on peat • Inceptisols - Young soils • Mollisols - Grassland soils • Oxisols - Tropical forests • Spodosols - Cool, wet coniferous forests • Ultisols - Tropical and subtropical forests • Vertisols - Soils with cracks

  17. Global Soil Distribution

  18. Major Terrestrial Biomes

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