Time-series NDVI and greenness spectral indices in mid-to-late growth stages enhance maize yield estimation - Dayun Feng; Hongye Yang; Kexin Gao; Xiuliang Jin; Zhenhai Li; Chenwei Nie; Guoqiang Zhang; Liang Fang; Linli Zhou; Huirong Guo; Zhijie Jia; Bo Ming; et al. (Field Crops Research, 2025)