Zeng, Shan, Yipeng Tan, Yu Wang, Xiwen Luo, Lamei Yao, Denpang Huang, and Zewen Mo. 2020. “Structural Design and Parameter Determination for Fluted-Roller Fertilizer Applicator”. International Journal of Agricultural and Biological Engineering 13 (2):101-10. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/4999.