Jie Wang, Changwei Shen, Na Liu, Xin Jin, Xueshan Fan, Caixia Dong, Yangchun Xu. Non-Destructive Evaluation of the Leaf Nitrogen Concentration by In-Field Visible/Near-Infrared Spectroscopy in Pear Orchards. Sensors, 17(3):538, 2017. [doi]
Abstract is missing.