AUTHOR=Sun Jingguo , Zhao Youyou , Qin Xiaoming , Hu Zhenlan , Li Jianping , Guo Yali , Sun Guangwei , Chen Zhengguo , Huang Hong , Hu Chengxiao , Sun Xuecheng TITLE=Combined effect of molybdenum and nitrogen fertilization on nitrogen metabolism and amino acid content in tobacco leaves JOURNAL=Frontiers in Agronomy VOLUME=6 YEAR=2024 URL=https://www.frontiersin.org/journals/agronomy/articles/10.3389/fagro.2024.1427571 DOI=10.3389/fagro.2024.1427571 ISSN=2673-3218