The contents of soil microelement of each plot are low, which reason is the low contents of drift sand.
流沙中各微量元素含量较低是各处理土壤微量元素含量低的决定因素。
The contents and distribution of soil microelement follow certain regularity in the process of soil-forming.
在成土过程中，土壤微量元素的含量分布具有一定的规律性。
Methods To contrast the disparity of soil type, soil use, and basic characteristics, in particular microelement contents in high_mortality area and low_mortality area of esophageal cancer.
方法对比食管癌高、低死亡率区土壤类型、利用方式及土壤一般特性，尤其是在微量元素含量上的差异。
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