Patterns of soil organic carbon(SOC) vary widely across the landscape and land uses leading to large uncertainties in the SOC budget especially for agricultural landscapes where water erosion redistributes soil and SOC across the landscape.Samples from 448 sites(0-20cm) and 33 sites(0-200cm) were collected during May 2004 at Wangdonggou watershed in the gully region of the Loess Plateau to measure SOC,and analyzed the effect of land use,landform(tableland,slope land,and gully) and depth on SOC.Soil sampling...
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