TY - JOUR A1 - Watanabe, T. A1 - Bowatte, S. A1 - Newton, P. C. D. T1 - A reduced fraction of plant N derived from atmospheric N (%Ndfa) and reduced rhizobial nifH gene numbers indicate a lower capacity for nitrogen fixation in nodules of white clover exposed to long-term CO2 enrichment JO - Biogeosciences J1 - BG VL - 10 IS - 12 SP - 8269 EP - 8281 Y1 - 2013/12/16 PB - Copernicus Publications SN - 1726-4189 UR - https://bg.copernicus.org/articles/10/8269/2013/ L1 - https://bg.copernicus.org/articles/10/8269/2013/bg-10-8269-2013.pdf DO - 10.5194/bg-10-8269-2013 ER -