【序号】:1 【作者】:Yu, Y., Z. Guo, H. Wu, J. A. Kahmann, and F. Oldfield 【题名】:Spatial changes in soil organic carbon density and storage of cultivated soils in China from 1980 to 2000 【期刊】: Global Biogeochem. Cycles, doi:10.1029/2008GB003428, in press 【年、卷、期】: 【全文链接】:http://www.agu.org/journals/gb/papersinpress.shtml