AUTHOR=Shen Xianbao , Yu Wenhan , Yao Zhiliang , Kong Lei , Wu Bobo , Xuan Kaijie , Cao Xinyue , Li Xin , Zhang Hanyu , Hao Xuewei , Zhou Qi TITLE=Real-world fuel-based and tillage area-based emission factors of agricultural machines during different tillage processes JOURNAL=Frontiers in Environmental Science VOLUME=Volume 10 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2022.1031647 DOI=10.3389/fenvs.2022.1031647 ISSN=2296-665X