World Congress of Soil Science
The World Congress of Soil Science (WCSS) is a conference held every four years (although interrupted by World War II) under the guidance of the International Union of Soil Sciences (IUSS). The purpose of a congress is to: (i) ensure the advancement of soil science and its application, and (ii) to handle the business of the society.
Source: Wikipedia — World Congress of Soil Science (CC BY-SA 4.0)