Other soil science societies
International Union of Soil Sciences
http://www.iuss.org

World wide soil science societies list (BSSS)
http://www.soils.org.uk/sig/sig.wss.htm

New Zealand SSS
http://nzsss.rsnz.org/

SSS America
http://www.soils.org/

British SSS
http://www.soils.org.uk/