Li, Yuanhong, Zuoxi Zhao, Zhi Qiu, Yangfan Luo, and Yuchan Zhu. 2020. “Modeling Effectiveness and Identification of Multi-Scale Objects in Farmland Soils With Improved Yee-FDTD Methods”. International Journal of Agricultural and Biological Engineering 13 (6). Beijing, China:150-58. https://ijabe.org/index.php/ijabe/article/view/5443.