RT Journal Article SR Electronic T1 Nitrogen and Climate Change JF Science JO Science FD American Association for the Advancement of Science SP 1512 OP 1513 DO 10.1126/science.1091390 VO 302 IS 5650 A1 Hungate, Bruce A. A1 Dukes, Jeffrey S. A1 Shaw, M. Rebecca A1 Luo, Yiqi A1 Field, Christopher B. YR 2003 UL http://science.sciencemag.org/content/302/5650/1512.abstract AB