Quantification of global and national nitrogen budgets for crop production

Xin Zhang, Tan Zou, Luis Lassaletta, Nathaniel D. Mueller, Francesco N. Tubiello, M. D. Lisk, Chaoqun Lü, Richard T. Conant, Christopher D. Dorich, James Gerber, Hanqin Tian, Tom Bruulsema, Tai McClellan Maaz, Kazuya Nishina, Benjamin Leon Bodirsky, Alexander Popp, Lex Bouwman, Arthur Beusen, Jinfeng Chang, Peter Havlík, David Leclère, Josep G. Canadell, Robert B. Jackson, Patrick Heffer, Nathan Wanner, Weifeng Zhang, Eric A. Davidson