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The vicious cycle of depletion

The vicious cycle of depletion

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Uploaded 21 Feb 2012 by GRID-Arendal
Year: 2009 Author: Riccardo Pravettoni, UNEP/GRID-Arendal
Description:
Agricultural systems in the temperate zone tend to occupy fertile soils that would have formerly supported temperate grassland or forest. Land clearance for croplands and pasture has greatly reduced above ground carbon stocks from their original state and soil carbon stocks are also often depleted as tillage disrupts the soil, opening it to decomposer organisms and generating aerobic conditions that stimulate respiration and release of carbon dioxide.
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