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Spatial distributions of 0–20 cm soil carbon sources/sinks caused by land use changes from the year 1980 to 2000 in an area of 2.97 × 106 km2 in eastern China were investigated using a land use dataset from a recent soil geochemical survey. A map of soil carbon sources/sinks has been prepared based on a spatial analysis scheme with GIS. Spatial statistics showed that land use changes had caused 30...
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