Soil genesis and classification.

摘要: Authors vii Preface to the First Edition ix Second x Third xi Fourth xiii Fifth xiv Sixth xv 1. Introduction 3 2. Morphology and Composition of Soils 35 3. Soil-forming Factors: Soil as a Component Ecosystems 89 4. Materials Weathering 141 5. Processes 163 6. Modern Classification Systems 181 7. U.S. Taxonomy 207 8. Alfisols: High Base Status with Finer-textured Subsoil Horizons 233 9. Andisols: Andic Properties 249 10. Aridisols: Dry Regions 265 11. Entisols: Recently Formed 283 12. Gelisols: Very Cold 293 13. Histosols: Organic 307 14. Inceptisols: Embryonic Few Diagnostic Features 321 15. Mollisols: Grassland Steppes Prairies 331 16. Oxisols: Low Activity 349 17. Spodosols: Accumulations Humus Sesquioxides 361 18. Ultisols: 375 19. Vertisols: Shrinking Swelling Dark Clay 385 20. Spatial Arrangement Soils: Soilscapes Map Units 397 21. Interpretations Surveys Technical 425 Bibliography 437 Index 531 Color plate section located between pages 232