Long-term effects of gravel-sand mulch on soil organic carbon and nitrogen in the Loess Plateau of northwestern China
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Funding for this research was provided by the Office of Agricultural Program,Chinese Academy of Sciences kscx2-ew-b-1-8 and the National Natural Science Foundation of China 41171027.
2015-06-04(万方平台首次上网日期,不代表论文的发表时间)
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