SUMMARY
The main goal of this research theme is to find the best sunflower hybrids (Helianthus annuus) suitable for the South area of Romania, which in various fertilization and technology conditions can give high and stable yields. Crop management was performed in optimal technology, specific to the area of culture, not irrigated variant, the researched genotypes consisting in three hybrids: Performer (control), Barolo RO, and PR64A89. The experiment was placed on a uniform land concerning the fertility and the landscape, on a chernozem soil, in an experimental field belonging to NARDI Fundulea. The conclusions consist in detecting the associated influence of two culture factors, respectively the plant density and fertilization, on the sunflower yield in the climatic conditions of the year 2012.