Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Isobe Katsunori and Okumura Kaoru and Yamaguchi Kaoru and Asano Hiroomi and Ishii Ryuichi,2 Fetilizer effects of Aigamo duck's dung : I. Exudation process of ammonium nitrogen from the dung,Kanto Journal of Crop Science,1341-6359,Crop Science Society of Japan kanto Branch,2001,16,0,16-17,https://cir.nii.ac.jp/crid/1390282680813303424,https://doi.org/10.20768/jcskanto.16.0_16