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Appendix 2: Codes for the reference soil groups and soil subunits

A. Reference Soil Group Codes

B. Soil Unit Adjectives Codes

Soil Unit Specifier Codes

WORLD SOIL-RESOURCES REPORTS

1 Report of the First Meeting of the Advisory Panel on the Soil Map of the World, Rome, 19-23 June 1961.**

2 Report of the First Meeting on Soil Survey, Correlation and Interpretation for Latin America, Rio de Janeiro, Brazil, 28-31 May 1962**

3 Report of the First Soil Correlation Seminar for Europe, Moscow, USSR, 16-28 July 1962.**

4 Report of the First Soil Correlation Seminar for South and Central Asia, Tashkent, Uzbekistan USSR, 14 September-2 October 1962.**

5 Report of the Fourth Session of the Working Party on Soil Classification and Survey (Subcommission on Land and Water Use of the European Commission on Agriculture), Lisbon, Portugal, 6-10 March 1963.**

6 Report of the Second Meeting of the Advisory Panel on the Soil Map of the World, Rome, 9-11 July 1963. **

7 Report of the Second Soil Correlation Seminar for Europe, Bucharest, Romania, 29 July-6 August 1963.**

8 Report of the Third Meeting of tile Advisory Panel on the Soil Map of the World, Paris, 3 January 1964.**

9 Adequacy of Soil Studies in Paraguay, Bolivia and Peru, November-December 1963.**

10 Report on the Soils of Bolivia, January 1964.**

11 Report on the Soils of Paraguay, January 1964.**

12 Preliminary Definition, Legend and Correlation Table for the Soil Map of the World, Rome, August 1964.**

13 Report of tile Fourth Meeting of the Advisory Panel on the Soil Map of the World, Rome, 16-21 May 1964. **

14 Report of the Meeting on the Classification and Correlation of Soils from Volcanic Ash, Tokyo Japan, 11-27 June 1964.**

15 Report of the First Session of the Working Party on Soil Classification, Survey and Soil Resources of the European Commission on Agriculture, Florence, Italy, 1-3 October 1964.**

16 Detailed Legend for the Third Draft on the Soil Map of South America, June 1965. **

17 Report of the First Meeting on Soil Correlation for North America, Mexico, 1-8 February 1965.**

18 The Soil Resources of Latin America, October 1965.**

19 Report of tile Third Correlation Seminar for Europe: Bulgaria, Greece, Romania, Turkey, Yugoslavia, 29 August-22 September 1965. **

20 Report of the Meeting of Rapporteurs, Soil Map of Europe (Scale 1:1000000) (Working Party on Soil Classification and Survey of the European Commission on Agriculture), Bonn, Federal Republic of Germany, 29 November-, December 1965.**

21 Report of the Second Meeting on Soil Survey, Correlation and Interpretation for Latin America, Rio de Janeiro, Brazil, 13-16 July 1965.**

22 Report of the Soil Resources Expedition in Western and Central Brazil, 24 June-9 July 1965.**

23 Bibliography on Soils and Related Sciences for Latin America (1st edition), December 1965. **

24 Report on tile Soils of Paraguay (2nd edition), August 1964.**

25 Report of the Soil Correlation Study Tour in Uruguay, Brazil and Argentina, June-August 1964.**

26 Report of the Meeting on Soil Correlation and Soil Resources Appraisal in India, New Delhi, India, 5-15 April 1965.**

27 Report of the Sixth Session of tile Working Party on Soil Classification and Survey of tile European Commission on Agriculture, Montpellier, France, 7-11 March 1967. **

28 Report of the Second Meeting on Soil Correlation for North America, Winnipeg-Vancouver Canada, 25 July-5 August 1966.**

29 Report of the Fifth Meeting of tile Advisory Panel on the Soil Map of the World, Moscow, USSR, 20-28 August 1966. **

30 Report of the Meeting of the Soil Correlation Committee for South America, Buenos Aires, Argentina, 12-19 December 1966.**

31 Trace Element Problems in Relation to Soil Units in Europe (Working Party on Soil Classification and Survey of the European Commission on Agriculture), Rome, 1967.**

32 Approaches to Soil Classification, 1968.**

33 Definitions of Soil Units for the Soil Map of the World, April 1968. **

34 Soil Map of South America 1:5000000. Draft Explanatory Text, November 1968.**

35 Report of a Soil Correlation Study Tour in Sweden and Poland, 27 September-14 October 1968.**

36 Meeting of Rapporteurs, Soil Map of Europe (Scale 1:1000000) (Working Soil Classification and Survey of the European Commission on Agriculture), Poitiers, France 21-23 June 1967.**

37 Supplement to Definition of Soil Units for the Soil Map of tile World, July 1969. **

38 Seventh Session of tile Working Party on Soil Classification and Survey of tile European Commission on Agriculture, Varna, Bulgaria, 11-13 September 1969.**

39 A Correlation Study of Red and Yellow Soils in Areas with a Mediterranean Climate.**

40 Report of the Regional Seminar of the Evaluation of Soil Resources in West Africa, Kumasi, Ghana, 14-19 December 1970.**

41 Soil Survey and Soil Fertility Research in Asia and the Far East, New Delhi, 15-20 February 1971 **

42 Report of the Eighth Session of the Working Party on Soil Classification and Survey of tile European Commission on Agriculture, Helsinki, Finland, 5-7 July 1971.**

43 Report of tile Ninth Session of the Working Party on Soil Classification and Survey of tile European Commission on Agriculture, Ghent, Belgium 28-31 August 1973.**

44 First Meeting of the West African Sub-Committee on Soil Correlation for Soil Evaluation and Management, Accra, Ghana, 12-19 June 1972.**

45 Report of the Ad Hoc Expert Consultation on Land Evaluation, Rome, Italy, 6-8 January 1975.**

46 First Meeting of tile Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Nairobi, Kenya, 11-16 March 1974. **

47 Second Meeting of tile Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Addis Ababa, Ethiopia, 25-30 October 1976.

48 Report on the Agro-Ecological Zones Project, Vol. 1 - Methodology and Results for Africa, 1978. Vol. 2 - Results for Southwest Asia, 1978.

49 Report of an Expert Consultation on Land Evaluation Standards for Rainfed Agriculture, Rome, Italy, 25-28 October 1977.

50 Report of an Expert Consultation on Land Evaluation Criteria for Irrigation, Rome, Italy, 27 February-2 March 1979.

51 Third Meeting of tile Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Lusaka, Zambia, 18-30 April 1978.

52 Land Evaluation Guidelines for Rainfed Agriculture, Report of an Expert Consultation, 12-14 December 1979.

53 Fourth Meeting of the West African Sub-Committee for Soil Correlation and Land Evaluation, Banjul, The Gambia, 20-27 October 1979.

54 Fourth Meeting of tile Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Arusha, Tanzania, 27 October-4 November 1980.

55 Cinquiéme réuinion du Sous-Comité Ouest et Centre africain de corrélation des sols pour la mise en valeurvaleur des series, Lomé, Togo, 7-12 décembre 1981.

56 Fifth Meeting of tile Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Wad Medani, Sudan, 5-10 December 1983.

57 Sixième réunion du Sous-Comité Ouest et Centre Africain de corrélation des sols pour la mise en valeur des terres, Niamey, Niger, 6-12 février 1984.

58 Sixth Meeting of the Eastern African Sub-Committee for Soil Correlation and Land Evaluation, Maseru, Lesotho, 9-18 October 1985.

59 Septième réunion du Sous-Comité Ouest et Centre africain de corrélation des sols pour la mise en valeur des terres, Ouagadougou, Burkina Faso, 10-17 novembre 1985.

60 Revised Legend, Soil Map of the World, FAO-Unesco-lSRIC, 1988. Reprinted 1990.

61 Huitième réunion du Sous-Comité Ouest et Centre africain de corrélation des sols pour la mise en valeur des terres, Yaoundé, Cameroun, 19-28 janvier 1987.

62 Seventh Meeting of the East and Southern African Sub-Committee for Soil Correlations and Evaluation, Gaborone, Botswana, 30 March-8 April 1987.

63 Neuvième réunion du Sous-Commité Ouest et Centre africain de corrélation des sols pour la mise en valeur des terres, Cotonou, Benin, 14-23 novembre 1988.

64 FAO-ISRIC Soil Database (SDB), 1989.

65 Eighth Meeting of the East and Southern African Sub-Committee for Soil Correlation and Land Evaluation, Harare, Zimbabwe, 9-13 October 1989.

66 World soil resources. An explanatory note on tile FAO World Soil Resources Map at 1:25000000 scale, 1991. Rev. 1, 1993.

67 Digitized Soil Map of the World, Volume 1: Africa. 2: North and Central America. Volume 3: Central and South America. Volume 4: Europe and West of the Urals. Volume 5: Nolth East Asia. Volume 6: Near East and Far East. Volume 7: South East Asia and Oceania. Release 1.0, November 1991.

68 Land Use Planning Applications. Proceedings of the FAO Expert Consultation 1990, Rome, 10-14 December 1990.

69 Dixième réunion du Sous-Comité Ouest et Centre africain de corrélation des sols pour la mise en valeur des terres, Bouaké, Odienné, Côte d'Ivoire, 5-12 novembre 1990.

70 Ninth Meeting of the East and Southern African Sub-Committee for Soil Correlation and Land Evaluation, Lilongwe, Malawi, 25 November - 2 December 1991.

71 Agro-ecological land resources assessment for agricultural development planning. A case study of Kenya. Resources data base and land productivity. Main Report. Technical Annex 1: Land resources. Technical Annex 2: Soil erosion and productivity. Technical Annex 3: Agro-climatic and agro-edaphic suitabilities for barley, oat, cowpea, green gram and pigeonpea. Technical Annex 4: Crop productivity. Technical Annex 5: Livestock productivity. Technical Annex 6: Fuelwood productivity. Technical Annex 7: Systems documentation guide to computer programs for land productivity assessments. Technical Annex 8: Crop productivity assessment: results at district level. 1991. Main Report 71/9: Making land use choices for district planning, 1994.

72 Computerized systems of land resources appraisal for agricultural development, 1993.

73 FESLM: an international framework for evaluating sustainable land management, 1993.

74 Global and national soils and terrain digital databases (SOTER), 1993. Rev. 1, 1995.

75 AEZ in Asia. Proceedings of the Regional Workshop on Agro-ecological Zones Methodology and Applications, Bangkok, Thailand, 17-23 November 1991.

76 Green manuring for soil productivity improvement, 1994.

77 Onzième réunion du Sous-Comité Ouest et Centre africain de correlation des sols pour la mise en valeur des terres, Ségon, Mali, 18-26 janvier 1993.

78 Land degradation in South Asia: its severity, causes and effects upon the people, 1994.

79 Status of sulphur in soils and plants of thirty countries, 1995.

80 Soil survey: perspectives and strategies for the 21st century, 1995.

81 Multilingual soil database, 1995.

82 Potential for forage legumes of land in West Africa, 1995.

83 Douzième réunion du Sous-Comité Ouest et Centre africain de corélation des sols pour la mise en valeur des terres, Bangui, République Centrafricain, 5-10 décembre 1994.

84 World reference base for soil resources, 1998.

** Out of print

This publication is a technical manual for soil scientists and soil correlators, designed to facilitate the exchange of information and experience to provide a common scientific language to enhance communication with other disciplines. It contains definitions and diagnostic criteria for soil horizons, soil properties and soil materials and gives rules and  guidelines for classifying and subdividing soil reference groups.