It is an established fact that the amount of food needed to feed the ever growing future human population will not be enough, i f appropriate measures are not taken. Accordingly, different production methods have been developed. This study aimed to determine the effect of magnetic field strength on seedling development in sunflower (Helianthus annuus L.). The "Tarsan-1018" oil sunflower variety was used in the study. The seeds were exposed to different magnetic field strengths (0-control, 75, 150 and 300 mT) for 36h before planting. The study was carried out with four replications according to the randomized plot design. In the study, seedling length (cm), root length (cm), seedling fresh weight (mg), seedling dry weight (mg), and seedling water content (mg) values were determined. All properties except for seedling dry weight were positively affected by magnetic field treatments. The study showed that the magnetic field strength had a positive effect on the seedling growth in sunflower
