土壤钙含量
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total calcium content of soil 土壤全钙含量
exchangeable calcium content in soil 土壤交换性钙含量
soil calcium content
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Cement flying dust decreased the yield of rice and rape at some farmlands, but did not produce harmful effect on its quality. There was an obvious increase in calcium content in polluted soil.
水泥粉尘使一些农田水稻和油菜产量有所下降，但对质量未产生不良影响，水泥粉尘会使土壤中钙的含量明显增加。
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