Based on the 19 years fix position experiment on microelement fertilizer application on the Loess Plateau,the distribution of trace elements on soil profile was studied in this paper.The result showed that the content of available trace element was increased in topsoil after 19-year application of microelement fertilizer,in which the content of available Cu and Zn was increased by more than 5 times and 3.58 times,respectively.In term of the spatial variation in the profile,the change tendency of available C...
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