Welcome to the website of the Working Group Humus Forms of the German Soil Science Society.

Symposium Water Balance and Element Budget of forest soils under stressing Conditions
24th to 26th April – Göttingen – Registration

On our website you will find the current German systematics of humus forms as well as the definition of the horizons relevant to humus forms and a glossary about important technical terms. A detailed description of the new sysematics of humus forms can be found in our publication

Please address your inquiries to Christine Wachendorf: Mail contact


Olf – feinhmusarmer Of-Horizont mit Kotbällchen Streu zersetzender Bodenfauna – © Jan Evers

Olf: a modified Of horizon, poor in fine humus material, with droppings of soil fauna                © Jan Evers