The Instrument Neutron Activity Analysis(INAA) is used to determine the contents of 8 rare earth element(REE), La,Ce,Nd,Sm,Eu,Tb,Yb and Lu, in 104 soil samples which are major soil types of Loess Plateau including Huihe soil,Lou soil,Heilu soil,Huangmian soil and Huigai soil, ect. Changes of REE in major soil types of Loess Plateau and distributing principles are analyzed and the basic theory for application of REE in agriculture and an effective way for raising efficiency of REE used in Loess Plateau are p...
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