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Getting Dirty with SOILS Why Care? Why Care? I. Soil Profile the horizons…… O A B C R R E Diagnostic properties (B horizon) • Texture • Structure • Color Texture •Structure Diagnostic properties (B horizon) • Texture • Structure • Color Munsell Color Chart R Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate B. Biota Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate B. Biota C. Parent material Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate B. Biota C. Parent material 1. Residual soils vs. Transported soils Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate B. Biota C. Parent material D. Slope Soils II. Major Factors Controlling Soil Formation (from Jenny, 1951) A. Climate B. Biota C. Parent material D. Slope E. Time III. Major Soil Types III. Major Soil Types A. Method: non genetic, based solely on physical properties III. Major Soil Types A. Method: non genetic, based solely on physical properties III. Major Soil Types A. Method: non genetic, based solely on physical properties B. Soil Types (Orders) there are 12 total…..we will examine some of these. Soil Orders Inceptisols Mollisols Ultisols Oxisols Aridisols Vertisols Inceptisol Found on steep hillslopes and floodplains Ultisols Common in forested areas Oxisol Common in the tropics Mollisol Common in prairie environments Vertisol Aridisols IV. Synthesis of Climate, Time, and Parent Material V. Soil Fertility A. Fertilizers 5 – 10 - 5 V. Soil Fertility A. Fertilizers 5 – 10 – 5 N P K V. Soil Fertility A. Fertilizers Nitrogen V. Soil Fertility A. Fertilizers Nitrogen * darker, stronger leaves V. Soil Fertility A. Fertilizers Nitrogen * darker, stronger leaves * helps with uptake of other nutrients V. Soil Fertility A. Fertilizers Phosphorous V. Soil Fertility A. Fertilizers Phosphorous * strengthens stems and roots V. Soil Fertility A. Fertilizers Phosphorous * strengthens stems and roots * enhances flowering, and seed production V. Soil Fertility A. Fertilizers Phosphorous * strengthens stems and roots * enhances flowering, and seed production * increases plant’s resistance to certain diseases V. Soil Fertility A. Fertilizers Potassium (Potash) V. Soil Fertility A. Fertilizers Potassium (Potash) * strengthens cell walls and stems of plants. V. Soil Fertility A. Fertilizers Potassium (Potash) * strengthens cell walls and stems of plants. * helps in plant respiration and uptake of other minerals. V. Soil Fertility A. Fertilizers B. Organic Matter V. Soil Fertility A. Fertilizers B. Organic Matter C. Lime V. Soil Fertility A. Fertilizers B. Organic Matter C. Lime D. Trace Elements essential to plants Fe, Cu, Zn Mg, Mg VI. Soil Erosion southern Illinois ~3 ft high VI. Soil Erosion Alexandria Fredericksburg Richmond Petersburg Emporia Alexandria Fredericksburg Richmond Petersburg Emporia