Development and performance evaluation of an electro-hydraulic downforce control system for planter row unit. - Huirong Jing; Dongxing Zhang; Yunxia Wang; Li Yang 013; Chenlong Fan; Huihui Zhao; Hailiang Wu; Yaohui Zhang; Jingchun Pei; Tao Cui (Comput. Electron. Agric., 2020)