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As the world’s population continues to expand, maintaining and indeed increasing agricultural productivity is more important than ever, though it is also more difficult than ever in the face of changing weather patterns that in some cases are leading to aridity and desertification. The absence of scientific soil inventories, especially in arid areas, leads to mistaken decisions about soil use that, in the end, reduce a region’s capacity to feed its population, or to guarantee a clean water supply. Greater efficiency in soil use is possible when these resources are properly classified using international standards. Focusing on arid regions, this volume details soil classification from many countries. It is only once this information is properly assimilated by policymakers it becomes a foundation for informed decisions in land use planning for rational and sustainable uses.
Now in it's third edition of World Soils provides a concise account of the soils of the world. It has been completely revised to include developments in the last decade in pedology and soil science. The introduction provides a definition of soils and outlines the author's approach. Successive chapters examine the composition, factors and processes behind the formation of soils. The topic of soil classification is dealt with in a user-friendly manner and includes an historical overview leading to the current FAO-Unesco Soil Map of the World system. The 28 major soil groups are described and their formation discussed. Chapters on soil mapping and soil use are also included. World Soils is written for a wide readership including students of environmental science, geography, ecology, forestry and agriculture, as well as the many other disciplines of study which include some consideration of soil as a natural resource. It will be useful to sixth-form students as well as first and second year undergraduates.
This book, first published in 1978, provides a comprehensive guide to soil properties in any major world region. It emphasizes the significance of the spatial changes in soil patterns, the environmental influence on soils, and their temporal changes, but focuses attention on the systematic examination of soil properties and their reciprocal effects. It covers such important topics as the mineral composition of different soils, their organic matter, structure and porosity, chemical make-up and mechanical properties.
Now in it's third edition of World Soils has been updated to include the latest developments in pedology and soil science.
Developments in soil classification have accompanied parallel progress in our understanding of the soil system. However the theories behind the classifications and the purposes for which they were created have changed over time. The editors hope that this comprehensive synthesis will help to rally soil scientists around the world to develop an acce
This publication is a revised and updated version of World Soil Resources Reports No. 84 and 103 and presents the international soil classification system. Every soil in the world can be allocated to one of the 32 Reference Soil Groups as defined in this document, and can further be characterized by a set of qualifiers. The resulting soil name provides information on soil genesis, soil ecological function and soil properties relevant for land use and management. The same system, refined slightly, may be used to name the units of soil map legends, thereby providing comprehensive spatial information. By accommodating national soil classification systems, the World Reference Base facilitates the worldwide correlation of soil information.