CHINA ENVIRONMENTAL SCIENCECE
 
 
CHINA ENVIRONMENTAL SCIENCECE  1994, Vol. 14 Issue (1): 0-0    DOI:
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美国南部农业区地下水中硝酸盐的污染作者综述了在美国各州２０万个取样点调研的结果；说明了南部地下水中ＮＯ３－Ｎ的污染水平与地区资源的可获得性和环境因素密切相关。灌溉的农田区域在土壤排水性较好时，地下水ＮＯ３－Ｎ水平超过最高允许的１０ｍｇ／Ｌ。但在密集农...

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