Correlation of production constraints with the yield gap of apple cropping systems in Luochuan County, China
ZHANG Dong, WANG Chong, LI Xiao-lin, YANG Xiu-shan, ZHAO Lu-bang, XIA Shao-jie
Journal of Integrative Agriculture . 2019, (8): 1714 -1725 .  DOI: 10.1016/S2095-3119(18)62098-2