HE WORLD REFERENCE BASE FOR SOIL RESOURCES (WRB) AND ITS APPLICATION TO SOME SOILS OF ARGENTINA

Jorge Eloy GIMÉNEZ

Resumo


In response to recommendations of the 7th International Congress of Soil Science (Madison, USA, 1960), a project was undertaken by FAO and UNESCO to elaborate a world soil map at scale1:5,000,000 and the corresponding classification, which was published in ten volumes between 1971 and 1981. A new project was later conducted to improve the system, including the latest advances of soil science. This resulted in the World Reference Base for Soil Resources (WRB) which appeared in 1998. A new version was published in 2006, updated in 2007. This system was adopted by the International Union of Soil Science as the official system for soil correlation. This paper describes the structure of the system and its application to four soils of Argentina, classified as 1) Calcic Stagnic Solonetz (Episiltic, Endoclayic), 2) Luvic Stagnic Vertic Phaeozem (Abruptic, Episiltic, Endoclayic), 3) Haplic Phaeozem (Tephric) over Calcic Stagnic Solonetz; and 4) Calcic Solonetz (Yermic). The correlation with the Soil Taxonomy system is included. The classification proved to be useful to reflect the main processes acting in the soils and the presence of buried soils (soil No. 3), not totally contemplated by Soil Taxonomy.

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