@BOOK {BEKUNDA:2015, title = {Focus on nitrogen management challenges: from global to local scales}, editor = {Bekunda, M. and Reis, S. and Karanja, E. and Winiwarter, W. and Sutton, M. and Howard, C. and Yan, X. *}, booktitle = {Environmental Research Letters}, series = {Focus on nitrogen management challenges...}, year = {2015}, volume = {9}, publisher = {IOP Science}, isbn = {ISSN: 1748-9326}, note = {EAHub; Publication Type is Journal;}, url = {(http://iopscience.iop.org/1748-9326/page/Nitrogen management challenges)}, }