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Soil chemistry is the study of all the organic and inorganic components that exist in soils, and their interactions. The growth of plants and crops depends upon having the right nutrients available in the soil, and the application of fertilizers to regulate soil chemistry is a major cost of agriculture. The environmental aspects of soil chemistry are also important since soil chemistry largely determines the fate of pollutants in the environment. Table of Contents Preface. Introduction. Important Ions. Water and Solutions. Oxidation and Reduction. Inorganic Solid Phase. Soil Organic Matter. Weathering and Soil Development. Cation Retention (Exchange) in Soils. Anion and Molecular Retention. Acid Soils. Salt-Affected Soils. Index