Pedogenesis and Soil Taxonomy The Soil Orders

Wilding, L. P.; Smeck, N. E.; Hall, G. F.0-444-41882-7, 0-444-42137-8

Table of contents :
Pedogenesis and Soil Taxonomy……Page 4
Copyright Page……Page 5
DEDICATION……Page 6
LIST OF CONTRIBUTORS……Page 8
PREFACE……Page 10
CONTENTS……Page 12
Introduction……Page 18
Processes which contribute to the accumulation of organic matter……Page 24
Rates of organic accumulation……Page 31
Peat stratigraphy……Page 32
Chemistry of peatlands……Page 33
Decomposition of organic plant materials……Page 38
Other chemical and chemically related changes resulting from organic decomposition……Page 43
Physical changes associated with decomposition……Page 45
Shear strength and other physical characteristics with engineering significance……Page 54
Subsidence……Page 57
Classification……Page 60
References……Page 67
Systematics……Page 72
Physical properties……Page 75
Sulfide accumulation and oxidation……Page 80
Deeply disturbed soils……Page 81
Cumulative soils……Page 85
Field relationships……Page 88
Rates of soil development……Page 98
References……Page 103
Introduction……Page 108
Genesis of Vertisols……Page 110
Soil properties as related to genesis……Page 115
Classification of Vertisols……Page 134
References……Page 136
Distribution. extent and characteristics of areas of occurrence……Page 142
Important processes in horizon differentiation……Page 145
Properties of a selected Mollisol……Page 173
Summary of processes in Mollisols……Page 174
Epilogue……Page 176
References……Page 177
Introduction……Page 182
Occurrence……Page 183
Aridisol morphology……Page 186
Soil-forming processes and factors……Page 203
Aridisol taxonomy’……Page 225
References……Page 227
Development of the Spodosol concept……Page 234
Definition of the spodic horizon and Spodosols……Page 235
Factors controlling Spodosol distribution……Page 237
Kinds of Spodosols……Page 239
An example of a Spodosol (Laurentides series)……Page 240
The micromorphology of Spodosols……Page 242
The weathering profile of Spodosols……Page 250
The organic-matter—sesquioxide complex of spodic horizons……Page 253
A working hypothesis of Spodosol genesis……Page 257
Alternative hypotheses of Spodosol genesis……Page 260
Some special features of Spodosols……Page 262
Priorities in research on spodosol genesis……Page 264
References……Page 265
Morphology……Page 270
Principal horizons……Page 272
Special horizons……Page 275
Genetic considerations……Page 277
Processes in action……Page 281
Translocation and transformation of materials……Page 284
Summary……Page 292
References……Page 293
Geographic distribution……Page 300
Taxonomy……Page 301
Typical morphology……Page 305
Environmental factors……Page 307
Pedogenesis……Page 310
Clay minerals……Page 314
Summary……Page 334
References……Page 335
Introduction……Page 342
Geography of Oxisols……Page 343
Ecological determinants……Page 344
The oxic horizon and its properties……Page 347
Genesis of the oxic horizon……Page 356
Plinthite……Page 361
Oxisol profile……Page 366
References……Page 367
Introduction……Page 372
Genesis of Inceptisols……Page 375
Descriptions of Inceptisols……Page 379
References……Page 395
Master horizons and layers……Page 400
Transitional horizons……Page 401
Subordinate distinctions within master horizons and layers……Page 402
Table of equivalents between old and new horizon symbols……Page 403
SUBJECT INDEX……Page 408
AUTHOR INDEX……Page 416