1. The Chemical Composition of Soils 2. Soil Minerals 3. Soil Humus 4. The Soil Solution 5. Mineral Stability and Weathering 6. Oxidation-Reduction Reactions 7. Soil Particle Surface Charge 8. Soil Adsorption Phenomena 9. Exchangeable Ions 10. Colloidal Phenomena 11. Soil Acidity 12. Soil Salinity
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