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1·Soil is material base of agricultural ecological system and main studied object of agricultural geology.

土壤是农业生态系统中的物质基础，是农业地质研究的主要对象。

2·If best analysing condition of each element is deter mined, As, Sb, Bi, Hg and Se in agricultural geology samples can be determined continuously in sulpho acid medium.

确定了各元素的最佳分析条件，可在王水介质中连续测定农业地质调查样品中的砷、锑、铋、汞、硒。

3·Finally, the sources of heavy metals were discussed by associating pollution status, geology and industrial and agricultural situation of the Taiyuan Basin.

结合太原盆地的土壤重金属污染分析结果和太原盆地地质、工农业等情况，初步讨论重金属元素的来源。