Soil Science

  1. Soil Fertility and Plant Nutrition
    1. Essential Plant Nutrients
      1. Macronutrients
        1. Primary Macronutrients
          1. Nitrogen (N)
            1. Phosphorus (P)
              1. Potassium (K)
              2. Secondary Macronutrients
                1. Calcium (Ca)
                  1. Magnesium (Mg)
                    1. Sulfur (S)
                  2. Micronutrients
                    1. Iron (Fe)
                      1. Manganese (Mn)
                        1. Zinc (Zn)
                          1. Copper (Cu)
                            1. Boron (B)
                              1. Molybdenum (Mo)
                                1. Chlorine (Cl)
                                  1. Nickel (Ni)
                                2. Nutrient Sources and Availability
                                  1. Native Soil Reserves
                                    1. Organic Matter Decomposition
                                      1. Fertilizer Inputs
                                        1. Nutrient Mobility in Soil
                                          1. Mobile Nutrients
                                            1. Immobile Nutrients
                                            2. Factors Affecting Nutrient Availability
                                              1. Soil pH
                                                1. Soil Texture
                                                  1. Soil Moisture
                                                    1. Soil Temperature
                                                  2. Soil Testing and Plant Analysis
                                                    1. Soil Sampling Procedures
                                                      1. Timing
                                                        1. Depth
                                                          1. Sample Handling
                                                          2. Laboratory Analysis
                                                            1. Nutrient Extraction Methods
                                                              1. Interpretation of Results
                                                              2. Plant Tissue Analysis
                                                                1. Sampling Techniques
                                                                  1. Nutrient Sufficiency Ranges
                                                                2. Fertilizers and Soil Amendments
                                                                  1. Organic Amendments
                                                                    1. Animal Manures
                                                                      1. Compost
                                                                        1. Green Manures
                                                                        2. Inorganic (Mineral) Fertilizers
                                                                          1. Nitrogen Fertilizers
                                                                            1. Phosphorus Fertilizers
                                                                              1. Potassium Fertilizers
                                                                              2. Liming Materials for Acid Soils
                                                                                1. Types of Lime
                                                                                  1. Application Methods
                                                                                2. Sustainable Nutrient Management
                                                                                  1. The 4R's of Nutrient Stewardship
                                                                                    1. Right Source
                                                                                      1. Right Rate
                                                                                        1. Right Time
                                                                                          1. Right Place
                                                                                          2. Integrated Nutrient Management
                                                                                            1. Environmental Considerations

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                                                                                          7. Soil Classification and Mapping

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                                                                                          9. Soil and Water Conservation