The World Reference Base for Soil Resources (WRB) is an international framework for soil classification, correlation, and communication. First updated in 2007, this German edition provides a comprehensive system for classifying soils based on diagnostic horizons, properties, and materials. It was developed by the International Union of Soil Sciences (IUSS) in collaboration with the Food and Agriculture Organization (FAO) and the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR). The WRB aims to harmonize soil classification systems globally, enabling consistent communication and data exchange. The first edition was published in 1998 and was later updated in 2006. The German version, translated by Peter Schad, includes 32 reference soil groups (RSGs), each defined by specific diagnostic criteria. The WRB includes both prefix and suffix qualifiers to describe soil characteristics in detail. The system is used for soil mapping, resource management, and environmental studies. The WRB also provides guidelines for soil description and analysis, ensuring standardized methods for soil classification. The document outlines the principles, structure, and application of the WRB, emphasizing its role in global soil science and environmental research. It includes diagnostic horizons, properties, and materials, along with examples of soil classification. The WRB is a key tool for understanding soil resources and managing land use effectively.The World Reference Base for Soil Resources (WRB) is an international framework for soil classification, correlation, and communication. First updated in 2007, this German edition provides a comprehensive system for classifying soils based on diagnostic horizons, properties, and materials. It was developed by the International Union of Soil Sciences (IUSS) in collaboration with the Food and Agriculture Organization (FAO) and the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR). The WRB aims to harmonize soil classification systems globally, enabling consistent communication and data exchange. The first edition was published in 1998 and was later updated in 2006. The German version, translated by Peter Schad, includes 32 reference soil groups (RSGs), each defined by specific diagnostic criteria. The WRB includes both prefix and suffix qualifiers to describe soil characteristics in detail. The system is used for soil mapping, resource management, and environmental studies. The WRB also provides guidelines for soil description and analysis, ensuring standardized methods for soil classification. The document outlines the principles, structure, and application of the WRB, emphasizing its role in global soil science and environmental research. It includes diagnostic horizons, properties, and materials, along with examples of soil classification. The WRB is a key tool for understanding soil resources and managing land use effectively.