Journal of Japan Society on Water Environment
Online ISSN : 1881-3690
Print ISSN : 0916-8958
ISSN-L : 0916-8958
NOTE
Nitrate Cioncentration in Ground Water Around Paddy Field
Hiroyuki KAWASHIMA, Akito TSUMURA, Nobuharu KIHOH, Shinichi YAMASAKI, Kunihiro FUJII
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Keywords: nitrate, ground water, paddy field, seasonal change, dissolved oxygen
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1992 Volume 15 Issue 12 Pages 924-927

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Abstract

Seasonal change of nitrate concentration in the artesian wells ware investigated. The wells are around the paddy field in Tsukuba, Ibaraki prefecture. Nitrate is observed in the wells those dissolved oxygen concentration in relatively high. Ammonium is observed in the anaerobic wells. The average concentration of nitrate in every wells are under 10mg·l-1, however high concentration over 10mg·l-1 are observed in certain wells in summer season.

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© 1992 Japan Society on Water Environment
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