Remotely Assessing Photosynthetic Nitrogen Use Efficiency within Situhyperspectral Remote Sensing in Winter Wheat Publication Type: Journal Article Authors: Hai-Yan Zhang; Xing-Xu Ren; Yi Zhou; Ya-Peng Wu; Li He; Ya-Rong Heng; Wei Feng; Chen-Yang Wang Source: European Journal of Agronomy, Volume 101, p.90–100 (2018)