Long-term increased grain yield and soil fertility from intercropping

Xiaofei Li, Zhi-Gang Wang, Xing-Guo Bao, Jian-Hao Sun, Si-Cun Yang, Ping Wang, Cheng-Bao Wang, Jinpu Wu, Xinru Liu, Xiu-Li Tian, Yu Wang, Jian-Peng Li, Wang Yan, Haiyong Xia, Pei-Pei Mei, Xiao Feng Wang, Zhao Jian-hua, Rui‐Peng Yu, Weiping Zhang, Zong-Xian Che, Lin-Guo Gui, Ragan M. Callaway, David Tilman, Long Li