Genesis, Properties and Utilization To order this title, and for more information, click here
By S. Shoji, Faculty of Agriculture, Tohoku University, Sendai, Japan M. Nanzyo, Faculty of Agriculture, Tohoku University, Sendai, Japan R.A. Dahlgren, Land, Air & Water Research, University of California, Davis, CA, USA
Description Volcanic eruptions are generally viewed as agents of destruction, yet they provide the parent materials from which some of the most productive
soils in the world are formed. The high productivity results from a combination of unique physical, chemical and mineralogical properties.
The importance and uniqueness of volcanic ash soils are exemplified by the recent establishment of the Andisol soil order in Soil Taxonomy.
This book provides the first comprehensive synthesis of all aspects of volcanic ash soils in a single volume. It contains in-depth coverage
of important topics including terminology, morphology, genesis, classification, mineralogy, chemistry, physical properties, productivity
and utilization. A wealth of data (37 tables, 81 figures, and Appendix) mainly from the Tohoku University Andisol Data Base is used to
illustrate major concepts. Twelve color plates provide a valuable visual-aid and complement the text description of the world-wide distribution
for volcanic ash soils.
This volume will serve as a valuable reference for soil scientists, plant scientists, ecologists and geochemists
interested in biogeochemical processes occurring in soils derived form volcanic ejecta.
Contents Plates. Preface. Acknowledgements. The Authors.
1. Terminology, Concepts and Geographic Distribution of Volcanic Ash Soils. Terminology.
Central concepts. Geographic distribution of volcanic ash soils.
2. Morphology of Volcanic Ash Soils. Introduction.
Morphological characteristics. Examples of profile morphology.
3. Genesis of Volcanic Ash Soils. Introduction. Formation
of Andisols. Transition of Andisols to other soil orders.
4. Classification of Volcanic Ash Soils. Introduction. Classification
of Andisols. Classification of Andisols in the FAO/Unesco Soil Map of the World. National classifications of volcanic ash soils.
5.
Mineralogical Characteristics of Volcanic Ash Soils. Introduction. Volcanic ash as a parent material. Colloidal constituents
common to volcanic ash soils. Formation and transformation of colloidal constituents.
6. Chemical Characteristics of Volcanic
Ash Soils. Introduction. Inorganic constituents. Organic constituents. Metal humus complexes. Physico-chemical properties.
7.
Physical Characteristics of Volcanic Ash Soils. Introduction. Soil color. Soil texture. Soil structure. Soil consistence. Bulk
density and porosity. Water retention and plant available water. Water permeability. Irreversible changes in soil physical properties
with drying.
8. Productivity and Utilization of Volcanic Ash Soils. Introduction. Soil productivity. Chemical properties
relating to soil productivity. Physical properties relating to soil productivity. Utilization and management of volcanic ash soils in
Japan.
Appendix 1. Description and selected properties of Tsukuba soil, Findley Lake soil, Abashiri soil, and Yunodai
soil.
Appendix 2. Andisol TU database.
Appendix 3. Selected thermodynamic data and uncertainties used
in modeling mineral stability relationships in Fig. 5.12.
Appendix 4. Reactions and equilibrium constants (25°C)
used modeling stability relationships in Fig. 5.12.
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