A method for mechanized hybrid rice seed production using female sterile rice oleh Yumei Xia, Ning Tang, Yuanyi Hu, Ding Li, Shuangcheng Li, Xiaolan Bu, Mulan Yu, Shaowu Qi, Yishan Yang, Hongjin Zhu, Chenying Cao, Ping Li, Longping Yuan, Mengliang Cao