Influence of soil and climate conditions and plant populations on yield characteristics of sunflower hybrids of domestic and foreign breeding

The results of three years researches (2006-2008) in two agricultural and environmental zones of Krasnodar region (northern, central) and one of Adige Republic (southern-piedmont) are given. There are shown the changes of seed yield elements of three sunflower hybrids of different origin: Jupiter (VNIIT, Russia), Pomar (Euralis Semensis, France), S-207 (Mosanto, USA), de-pending on soil and climate conditions, sunflower agrocoenosis populations and studied hybrids characteristics.