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… The natural dynamic system of unconsolidated mineral and organic material at the earth’s surface. It has been … rock and the decay of vegetation. Soil materials include organic matter, clay, silt, sand and gravel mixed in such a … power generation, infrastructure and urbanisation, waste handling, traffic, etc. It is most often linked to soil …

… to combat desertification, to safeguard the processes of organic decomposition and to promote the continuing fertility …