About SUGITA FUMI
About 千葉商大 商経
About 日本水文科学会誌
About shallow groundwater
About nitrate nitrogen
About concentration distribution
About variance
About agricultural district
About fertilization (cultivation)
About eluviation
About denitrification (soil)
About flow field
About non-point source
About area source of pollution
About Water pollution in general
About 浅層地下水
About 硝酸性窒素
About 濃度分布
About ばらつき
About 要因