Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Formación de humus-es#Sense
Humification-en#Sense
Humusbildung-de#Sense
Humificación-es#Sense
Formation de l'humus-fr#Sense
Umificazione-it#Sense
Humifizierung-de#Sense
Formation of humus-en#Sense
Humification-fr#Sense