Higher capability of C₃ than C₄ plants to use nitrogen inferred from nitrogen stable isotopes along an aridity gradient - Luo, Wentao (Zhongguo ke xue yuan. Erguna Forest-Steppe Ecotone Research Station) ; Wang, Xiaoguang (Zhongguo ke xue yuan. Erguna Forest-Steppe Ecotone Research Station) ; Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Wang, Zhengwen (Zhongguo ke xue yuan. Erguna Forest-Steppe Ecotone Research Station) ; Dijkstra, Feike A. (The University of Sydney. Sydney Institute of Agriculture) ; Lü, Xiao-Tao (Zhongguo ke xue yuan. Erguna Forest-Steppe Ecotone Research Station) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Han, Xingguo (Zhongguo ke xue yuan. Erguna Forest-Steppe Ecotone Research Station)