Results of the examination of Rimi hybrid seed showed the existence of a highly significant effect of different substratum on germination energy and germination. Also, a highly significant influence was detected between treatments, while the substratum x treatments interaction was significant. On average, germination energy was the highest on filter paper and it was 90.10%. Also, the germination was the best on filter paper (92.05%).

The aim of the study was to assess the effects of hybrids and planting dates as well as their interaction on oil yield in sunflower forthree-year experiment (2005, 2006, 2007). Three sunflower hybrids (Miro, Rimi and Pobednik) and eight planting dates were included in the experiment. AMMI (Additive Main Effects and Multiplicative Interaction) analysis is one of the mainly used multiplicative models, which evaluates main effects and also interaction. The interaction was detected by using AMMI1 biplot.