Qi, Jiangtao, Xinliang Tian, Yang Li, Xuhui Fan, Hongfang Yuan, Jiale Zhao, and Honglei Jia. 2020. “Design and Experiment of a Subsoiling Variable Rate Fertilization Machine”. International Journal of Agricultural and Biological Engineering 13 (4):118-24. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/5757.