It can take more than 1000 years to form a centimeter of topsoil.

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The International Union of Soil Sciences (IUSS) is the global union of soil scientists. The objectives of the IUSS are to promote all branches of soil science, and to support all soil scientists across the world in the pursuit of their activities. This website provides information for IUSS members and those interested in soil science.

Soil associations

Regional soil science societies

Africa Soil Science Society
European Confederation of Soil Science Societies
East and Southeast Asia Federation of Soil Science Society
European Society for Soil Conservation
Federation of Eurasian Soil Science Societies
Latin American Soil Science Society
Pacific Regional Society of Soil Science (PRSSS)
Soil Science Society of East Africa website not available