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- W3142710005 abstract "In order to assess the extent of groundwater contamination by nitrate (NO3 - -N) and to provide infor- mation about the deterioration of the groundwater quality in Zhangye Oasis, Northwest China, a study was conducted in this area. The mean value of NO3 - -N concentrations in groundwater samples was 10.66 ± 0.19 mg l -1 .N O 3 - -N concentrations exceeding 10 mg l -1 (the threshold for drinking water set by the World Health Organization) were found in 32.4% of 71 wells, and were 13, 33.3, 52.4 and 50.0% in the groundwater samples from drinking wells, irrigation wells, hand-pumping wells and groundwater table observation wells, respectively. The result showed that the groundwater samples that had NO3 - -N concen- trations exceeding the threshold for drinking water were mostly collected from a depth of less than 20 m. Ground- water NO3 - -N concentrations in areas used for the culti- vation of vegetables, seed maize and intercropped maize were significantly higher than those in urban or paddy" @default.
- W3142710005 created "2021-04-13" @default.
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- W3142710005 date "2010-01-01" @default.
- W3142710005 modified "2023-09-27" @default.
- W3142710005 title "Nitrate contamination of groundwater in an agroecosystem in Zhangye Oasis, Northwest China" @default.
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