WRBjärjestelmää

WRBjärjestelmää refers to the World Reference Base for Soil Resources (WRB) classification system. It is an international system for classifying soils developed by the International Union of Soil Sciences (IUSS). The WRB system aims to provide a common language for soil scientists worldwide, facilitating communication, data comparison, and the transfer of soil knowledge.

The WRB system is hierarchical and diagnostic. It uses a limited number of reference soil groups (RSGs) which are then further differentiated by qualifiers. These qualifiers describe specific soil properties, processes, or conditions. The classification is based on observable and measurable soil properties, particularly those related to soil horizons, diagnostic features, and soil-forming processes.

Key aspects of the WRB system include its emphasis on soil properties that are relevant to soil functions and land use. It is designed to be adaptable to different scales and purposes, from local soil surveys to global assessments. The WRB system has undergone revisions to incorporate new scientific understanding and address practical needs. It is widely used in research, education, and land management applications globally. The system's goal is to promote a better understanding and sustainable management of the world's soils.