Almasri Mohammad N.Nitrate contamination of groundwater:A conceptual management framework[J].Environmental Impact Assessment Review,2007,27(3):220-242.
[4]
LIU G D,WU W L,ZHANG J.Regional differentiation of non-point source pollution of agriculture-derived nitrate nitrogen in groundwater in northern China[J].Agriculture,Ecosystems and Environment,2005,107:211-220.
Adrian H Gallardo,Walter Reyes-Borja,Norio Tase.Flow and patterns of nitrate pollution in groundwater:a case study of an agricultural area in Tsukuba City,Japan[J].Environmental Geology,2005,48(7):908-919.
[16]
Gonzalez Vazquez J C,Grande J A,Barragan F J.Nitrate accumulation and other components of the groundwater in relation to cropping system in an aquifer in Southwestern Spain[J].Water Resources Management,2005,19(1):1-22.