The abundance-deficiency index of soil K and recommended potassium fertilizer application rates for grain and forage millet in China
ZHU Kaidi, SUN Hongren, ZHANG Jiping, GANG Lihua, LYU Yucai, WANG Guojun, WEI Dengfeng
Journal of Northern Agriculture . 2022, (6): 31 -39 .  DOI: 10.12190/j.issn.2096-1197.2022.06.05