World reference base for soil resourcesWorld reference base for soil resources
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome, 1998
84 World Soil Resources Reports
International Society of Soil Science
ISSS-AISS-IBG
International Soil Reference and Information Centre
ISRIC
Food and Agriculture Organization of the United Nations
| The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations, the International Soil Reference and Information Centre or the International Society of Soil Science concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. |
M-41
ISBN 92-5-104141-5
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Ó FAO, ISRIC and ISSS 1998
History
Objectives
Principles
Elements of the world reference base for soil resources
Discussion
Chapter 2: Key to the reference soil groups
Key to the reference soil groups of the world reference base for soil resources
Chapter 3: Diagnostic horizons, properties and materials
Albic horizon
Andic horizon
Anthraquic horizon
Anthropedogenic horizons
Argic horizon
Calcic horizon
Cambic horizon
Chernic horizon
Cryic horizon
Duric horizon
Ferralic horizon
Ferric horizon
Folic horizon
Fragic horizon
Fluvic horizon
Gypsic horizon
Histic horizon
Hydragric horizon
Hortic horizon
Irragric horizon
Melanic horizon
Mollic horizon
Natric horizon
Nitic horizon
Ochric horizon
Petrocalcic horizon
Petroduric horizon
Petrogypsic horizon
Petroplinthic horizon
Plaggic horizon
Plinthic horizon
Salic horizon
Spodic horizon
Sulfuric horizon
Takyric horizon
Terric horizon
Umbric horizon
Vertic horizon
Vitric horizon
Yermic horizonAbrupt textural change
Albeluvic tonguing
Alic properties
Aridic properties
Continuos hard rock
Ferralic properties
Geric properties
Gleyic properties
Permafrost
Secondary carbonates
Stagnic properties
Strongly humic propertiesAnthropogeomorphic soil material
Calcaric soil material
Fluvic soil material
Gypsiric soil material
Organic soil material
Sulfidic soil material
Tephric soil material
Chapter 4: Classifying subdivisions of the reference soil groups
General principles for distinguishing lower level units
Definitions of formative elements for lower level units
Appendix 1: Soil horizon designations
Appendix 2: Codes for the reference soil groups and soil subunits