Humusica 2, article 10: Histic humus systems and forms - Key of classification

This paper corresponds to an illustrated field key of classification of Histic humipedon. Vocabulary and diagnostic horizon definitions are in Humusica 2, article 9. The process of classification can follow a step by step way or simply be realised choosing the right diagnostic horizon on a table and composing the whole profile as in a game of construction. Examples of real profiles are given for comparison with the ones people can find in the field.