Ammoniac nitrogen enters salt of nitric acid of the translate into after soil, the chroma when arriving at groundwater is less than 30 milligram / litre, far be less than the lowermost standard with drinkable groundwater.
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释义
氨氮进入土壤后转化为硝酸盐,到达地下水时浓度小于30毫克/升,远小于地下水饮用的最低标准。
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