weathered products / Classification systems / metal-humus complexes / chemical characteristic / soil solution / /
Organization
International Union of Soil Sciences / Information Centre / United Nations / Conservation Service / International Soil Reference and Information Centre / Agricultural University University / Land and Water Development Division / USDA / European Union / EUROPEAN SOIL BUREAU / Institute for Land and Water / United Nations Educational Scientific and Cultural Organization / /
Person
Soil Units / /
Position
farmer / qualifier / Major / intergrade qualifier / /