In order to evaluate the effects of location,soil depth,and land use on the soil light fraction organic carbon(LFOC) and soil heavy fraction organic carbon(HFOC),we investigated the contents and the distribution characteristics of soil LFOC and HFOC of three types(Ust-Sandiic-Entisols at Shenmu,Los-Orthic-Entisol at Yan an and Eum-Orthic-Anthrosol at Yangling) soils profiles(0-200 cm) sampled along a north-south gradient on the Loess Plateau.The results indicated that the contents of soil LFOC and HFOC decr...
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