For citations:

Guseva S.A., Zhuzhukin V.I., Zaitsev S.A., Volkov D.P. Ecological study of the sunflower varieties and hybrids in the lower volga region. Agrarian science. 2019;(3):69-71. (In Russ.) https://doi.org/10.32634/0869-8155-2019-323-3-69-71