Herbage Mass, N Concentration, and N Uptake of Temperate Grasslands Can Adequately Be Estimated from UAV-Based Image Data Using Machine Learning. - Ulrike Lussem; Andreas Bolten; Ireneusz Kleppert; Jörg Jasper; Martin Leon Gnyp; Jürgen Schellberg; Georg Bareth (Remote. Sens., 2022)