著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) SUBBIAH BV,A rapid procedure for the determination of available nitrogen in soils,Curr Sci,,,1956,25,,259-260,https://cir.nii.ac.jp/crid/1573950399771100160,