Through DTPA and M3 extration,soil available Cu,Zn and Mn was measured with atom absorber method in soil samples from southern Shanxi with various soil fertility.

• 对山西省晋南不同肥力的土样分别采取DTPA与M3提取,用原子吸收法测定土壤中的有效铜、锌、铁、锰。