Strategies for timing nitrogen fertilization of pear trees based on the distribution, storage, and remobilization of 15N from seasonal application of (15N H4)2SO4
JIANG Hai-bo, LI Hong-xu, ZHAO Ming-xin, MEI Xin-lan, KANG Ya-long, DONG Cai-xia, XU Yang-chun
Journal of Integrative Agriculture . 2020, (5): 1340 -1353 .  DOI: 10.1016/S2095-3119(19)62758-9