Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YOSHINAGA I,Nitrogen removal function of a paddy field in a circular irrigation system,"Proc 7th Int Conference Diffuse Pollution and Basin Management, 2003",,,2003,4,,43-48,https://cir.nii.ac.jp/crid/1573668924794143232,