Use of regulators of growth in increase of efficiency of hybrids of sunflower in KBR Irina Haniyeva, Rustam Abdulkhalikov, Yury Shogenov, Andemirkan Odizhev and Ahmed Sabolirov E3S Web Conf., 254 (2021) 07013 Published online: 05 May 2021 DOI: 10.1051/e3sconf/202125407013