Grain-filling characteristics and yield differences of maize cultivars with contrasting nitrogen efficiencies
Qiang Li, Lunjing Du, Dongju Feng, Yun Ren, Zhexin Li, Fanlei Kong, Jichao Yuan
The Crop Journal . 2020, (6): 990 -1001 .  DOI: 10.1016/j.cj.2020.04.001