In a field experiment in 2019, the growth, development and formation features of 34 corn hybrids yield were studied in OOO Skopa, Sonkovsky district, Tver region (Russia). 4 groups of hybrids with different productivity, average green mass yield with ears and absolutely dry phytomass (t/ha) were revealed: 1 – 6 hybrids (17.6%) 79.48 and 18.55; 2 - 6 hybrids (17.6%) 58.97 and 11.1; 3 – 13 hybrids (38.2%) 41.1 and 9.4; 4 – 9 hybrids (26.1%) 31.2 and 7.3 t/ha. The most productive were the hybrids LG 30189 (LimaGrain, France) and Zeta 110 S (LABOULET, France), which has a green mass yield of 87.5 and 91.8 t/ha, of absolutely dry mass – 21.39 and 18.52 t/ha, the PAR efficiency of these crops was 3.49 and 3.08%. Of the Russian hybrids, the most productive were Cascade 195 SV (Rossoshhybrid), ZP 190 SV and Voronezh 158 (Golden ear) with a green mass yield of 44.8 - 49.0 t/ha, absolutely dry 9.10 – 10.7 t/ha.