Optimal rate of nitrogen fertilizer application for organic onion farming in Hokkaido
北海道における春全量施肥を前提とした有機栽培タマネギの窒素施肥対応

Michihiko Sakurai, Masami Sakaguchi, Akihiro Furudate
Japanese Journal of Soil Science and Plant Nutrition  
doi:10.20710/dojo.89.3_213 fatcat:6dawvzf3djaz5i544623myuwwm