Identifying the limiting factors driving the winter wheat yield gap on smallholder farms by agronomic diagnosis in North China Plain
CAO Hong-zhu, LI Ya-nan, CHEN Guang-feng, CHEN Dong-dong, QU Hong-rui1, MA Wen-qi
Journal of Integrative Agriculture . 2019, (8): 1701 -1713 .  DOI: 10.1016/S2095-3119(19)62574-8