Research Article
Indirect 15N Isotope Techniques for Estimating N Dynamics and N Uptake by Rice from Poultry Manure and Sewage Sludge
Agricultural Research Center, Rice Research and Training Center, Sakha, 33717, Kafr El-Sheikh, Egypt
Hideto Ueno
Ehime University Farm, Faculty of Agriculture, Ehine University, 498 Ko, Hattanji, Ehime, 799-2424, Japan
Naomi Asagi
Ehime University Farm, Faculty of Agriculture, Ehine University, 498 Ko, Hattanji, Ehime, 799-2424, Japan
Takeshi Watanabe
Japan International Research Center for Agricultural Sciences, 1-1 Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan