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Soil Preservation

  • Keynote Paper

Abstract

The soils of the world’s land areas, together with the bottoms of the seas and lakes of planet earth, form a specific biogeochemical sphere. As a product of the continuous interactions of living matter and the earth’s crust, the soils and their counterparts in the hydrosphere represent a zone of concentration: of different living organisms, of the products of their metabolism, and of their remains. The living organisms (plants, animals, microbiota) and other components of soils constitute integral parts of the complicated ecological systems (ecosystems or biogeocoenoses) that both change and in turn depend on the history and peculiarities of their particular environments, which vary according to their geographical positions and circumstances. The most striking differences in the mosaic of these systems can be observed in progressing from the equator of the earth towards the poles, and from the high mountain areas towards the lowlands and seas.

Keywords

Humic Horizon United Nations Development Programme Irrigate Land Irrigation Canal Irrigate Soil 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Nicholas Polunin 1972

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