Acta Agrestia Sinica
The Rich-lack Index of Soil N and Recommended N Application Rates for Alfalfa in the Inner Mongolia Plateau of China
MI Chun-jiao, SUN Hong-ren, WANG Xian-guo, GAO Kai, ZHANG Yu-xia, LIU Ting-yu
Acta Agrestia Sinica . 2021, (12): 2785 -2791 .  DOI: 10.11733/j.issn.1007-0435.2021.12.019