Methods and experiments for collecting information and constructing models of bottom-layer contours in paddy fields. - Tuanpeng Tu; Jie He; Xiwen Luo; Lian Hu; Pei Wang 008; Gaolong Chen; Li Tian; Dawen Feng; Zhimin Wang; Zhongxian Man; Weicong Li; Zhenghui Wei; et al. (Comput. Electron. Agric., 2023)