Maize Yield Gains in Northeast China in the Last Six Decades
NIUXing-kui, XIERui-zhi, LIUXin, ZHANGFeng-lu, LIShao-kun , GAOShi-ju
Journal of Integrative Agriculture . 2013, (4): 630 -637 .  DOI: 10.1016/S2095-3119(13)60281-6