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Naore Village in the Shuangan countryside, Ziyang County, Shaanxi Province is located in the Daba region of South Qinling Mountain. It is one of two selenosis or selenium poisoning areas in China. Crops grown in the area are enriched in selenium. The soil is derived from high-selenium, pyritic, black carbonaceous slate and volcanic tuff of the Lujiaping Formation, Early Cambrian and Late Neoproterozoic...
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