Determination of Organic Carbon Content of Corn Stalk: A Casestudy in Laiyuan County, Hebei ProvinceZhuohan Liu, Shigang Shen, Jiangxue Dong, Na Yao, Qianwen Wu and Zhaowei FuE3S Web of Conf., 406 (2023) 04045DOI: https://doi.org/10.1051/e3sconf/202340604045