Elements characteristics and ecological risks of farmland soil with typical heavy metal high background in ChongqingJinhua Luan, Ruigang Zhang, Heming Tian, Jiahui Duan, Mohuan Ning, Lingling Mao, Feng Hu, Haitong Zhao, Changchao Li, Feng Liu and Sen ZhangE3S Web Conf., 478 (2024) 01024DOI: https://doi.org/10.1051/e3sconf/202447801024