The main aim of the working group is to develope further the german stratification of humusforms based on a pedogenetic background. Basis are diagnostic soil horizons and sequences of soil horizons of humus layer and mineral topsoil. The state of the art is documented on our homepage: www.humusformen.de.
Our second aim is the information and professional training of students and members of the Soil Science Society by workshops and scientific meetings. You find a summary of our previous activities on our homepage (www.humusformen.de /Rückblick).
The recent structuring of humusforms is published at the German Guidelines for Soil description (Bodenkundliche Kartieranleitung, 5. Auflage 2005) und the guidelines for forest site mapping (Forstliche Standortaufnahme, 6. Auflage 2003). A draft of a further devolopement is published on our homepage.
In the revised humusform stratification the soil water regime is considerated( humus aeration status: aeromorphic, aero-hydromorphic, hydromorphic). The humusforms are subdivided in sections (main group), classes (subgroup), humusforms (types), humussubforms (subtypes) and varieties as well as the stratification of soils. Therefore new diagnostic humus and soil horizons and sequences of soil horizons were specified. The results will be considered also in international classifications of humusforms.
Our recent systematic stratification shows deficits in the description of humusforms of poor aerated sites and sites with terrestrial humusforms developing on (drained) peat. Furthermore the demand of soil quality assessment in open landscape aereas is very high but the characterization of humuforms outlying forest is still in a developing status. Therefore the humusform group targets to reduce this lack of knowledge within the next years.