Research on density grading of hybrid rice machine-transplanted blanket-seedlings based on multi-source unmanned aerial vehicle data and mechanized transplanting test - Xicheng Wang; Zehua Li; Suiyan Tan; Hongwei Li; Long Qi; Yuwei Wang; Jiongtao Chen; Chuanyi Yang; Jiaying Chen; Yijuan Qin; Xu Ma (Computers and Electronics in Agriculture, 2024)