The second edition of the WRB was presented at the 18th World Congress of
Soil Science 2006 in Philadelphia, USA (book: IUSS Working Group WRB, 2006;
file: ftp://ftp.fao.org/agl/agll/docs/wsrr103e.pdf. After publication, some errors and
needs for improvement were identified, and an electronic update was published in
2007 http://www.fao.org/fileadmin/templates/nr/images/resources/pdf_documents/
wrb2007_red.pdf.
The second edition was translated into several languages. The Russian translation is
of the 2006 printed version; whereas all other translations are of the 2007 electronic
update: Arabic, German, Polish, Slovak, Spanish, and Turkish.
Since 2006, several WRB field correlation tours were organized to test the second
edition:
2007: Germany (special topic: Technosols and Stagnosols)
2009: Mexico
2010: Norway
2011: Poland
2012: Australia (Victoria and Tasmania)
2013: Russia (ultra-continental permafrost soils in Sakha)