Kolosok, I. “FEATURES OF THE YEILD FORMATION OF SUNFLOWER HYBRIDS IN THE CONDITIONS OF THE NORTH-EASTERN FOREST STEPPE OF UKRAINE”. Bulletin of Sumy National Agrarian University. The Series: Agronomy and Biology, Vol. 49, no. 3, Jan. 2023, pp. 32-39, doi:10.32845/agrobio.2022.3.5.