Hariadi, B.; Sastrohartono, H.; Krisdiarto, A. W.; Sukarman, S.; Sagoro, T. H.; Primananda, S.; Akbar, A. R. M.; Uktoro, A. I. The Use of the Normalized Difference Red Edge (NDRE) Vegetation Index from Multispectral Cameras Mounted on Unmanned Aerial Vehicle to Estimate the Nutrient Content in Oil Palm Leaves. JTEP-L 2024, 13, 1051-1063.