A handful of soil can contain billions of soil microorganisms.

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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 http://www.asssonline.org/
European Confederation of Soil Science Societies https://soilscience.eu/
East and Southeast Asia Federation of Soil Science Society http://jssspn.jp/ESAFS/
European Society for Soil Conservation http://www.soilconservation.eu/
Federation of Eurasian Soil Science Societies http://www.fesss.org/
Latin American Soil Science Society http://slcs.org.mx/index.php/es/
Pacific Regional Society of Soil Science (PRSSS) http://prsss.landfood.ubc.ca/
Soil Science Society of East Africa website not available