RT Journal Article T1 Spectral Variability Analysis of Lupinus mutabilis Sweet Under Nanofertilizer and Chelate Application Through Spectroscopy and Unmanned Aerial Vehicle (UAV) Multispectral Images A1 Sinde-González, Izar A1 Murgueitio-Herrera, Erika A1 Falconí, César E. A1 Gil Docampo, María de la Luz A1 Toulkeridis, Theofilos K1 Crop monitoring K1 Lupin K1 Nanofertilizer K1 Spectral analysis K1 Spectroscopy K1 UAV K1 Vegetation index AB Lupin is an Andean legume that has gained importance in Ecuador due to the protein content in its grain. Nonetheless, in recent times the production of lupin has been affected by inadequate nutritional management. In order to avoid such circumstances, the current study spectrally analyzed lupin cultivation under the application of nanofertilizers and Fe and Zn chelates, within two controlled trials, using a radiometer spectrum, an active crop sensor and a multispectral sensor mounted on a UAV. Vegetation indices were generated and subsequently statistically analyzed using ANOVA and Tukey tests. In the field trial, the treatments lacked an indication of significant improvements, while in the greenhouse trial, the nanofertilizer treatments indicated better results compared to the control treatments. However, it was also determined that the application of nanofertilizers at a concentration of 540 ppm demonstrated significant efficiency in greenhouse conditions, which could not be achieved in the field. Furthermore, the chelate treatment presented a certain degree of toxicity for the plant. PB MDPI YR 2025 FD 2025-02-14 LK https://hdl.handle.net/10347/46927 UL https://hdl.handle.net/10347/46927 LA eng NO Sinde-González, I., Murgueitio-Herrera, E., Falconí, C. E., Gil-Docampo, M., & Toulkeridis, T. (2025). Spectral Variability Analysis of Lupinus mutabilis Sweet Under Nanofertilizer and Chelate Application Through Spectroscopy and Unmanned Aerial Vehicle (UAV) Multispectral Images. Agronomy, 15(2). https://doi.org/10.3390/AGRONOMY15020469 DS Minerva RD 24 may 2026