Evaluating chlorophyll density in winter oilseed rape (Brassica napus L.) using canopy hyperspectral red-edge parameters. - Lantao Li; Tao Ren 004; Yi Ma; Quanquan Wei; ShanQin Wang; Xiaokun Li; Rihuan Cong; Shishi Liu; Jianwei Lu (Comput. Electron. Agric., 2016)