AUTHOR=Jiang Yuanbo , Li Haiyan , Ma Wenqiong , Yu Wenjing , Chen Junxian , Gao Yalin , Qi Guangping , Yin Minhua , Kang Yanxia , Ma Yanlin , Wang Jinghai , Xu Liting TITLE=A meta-analysis of the effects of nitrogen fertilizer application on maize (Zea mays L.) yield in Northwest China JOURNAL=Frontiers in Plant Science VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2024.1485237 DOI=10.3389/fpls.2024.1485237 ISSN=1664-462X