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.

• 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。