In Situ Crop and Soil Data and UAV Imagery from Winter Wheat Fields in a Bulgarian Site. - Petar Dimitrov; Eugenia Roumenina; Georgi Jelev; Lachezar Filchev; Alexander Gikov; Ilina Kamenova; Iliana Ilieva; Dessislava Ganeva; Milena Kercheva; Martin Banov; Veneta Krasteva; Viktor Kolchakov; et al. (Data, 2026)