Wang, B., Luo, X., Wang, Z., Zheng, L., Zhang, M., Dai, Y., & Xing, H. (2018). Design and field evaluation of hill-drop pneumatic central cylinder direct-seeding machine for hybrid rice. International Journal of Agricultural and Biological Engineering, 11(6), 33–40. https://doi.org/10.25165/ijabe.v11i6.4175