The effects of rare earth elements(REEs) on the relative seedling ratio of three crops(rice,rape and soybean)in three soil(red soil,yellow fluvo aquic soil and yellow cinnamon soil)were studied according to OECD method,and the LC 50 were obtained. Toxicity effect of REEs on rice was minimum among the crops tested. The toxicity on crops in yellow cinnamon soil was lower, whereas on soybean in yellow fluvo aquic soil and on rape in red earth were higher.
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