This experiment was undertaken to study the effect of different levels of gibberellic acid (GA 3) as a hormone on the yield components of soybean genotypes in summer double cropping as the second crop following a wheat harvest. The experiment was carried out in 4*2 factorial arrangement of a randomized complete block design (RCBD) with four replicates at the experimental farm of Lorestan Meteorological Office located in Khorramabad. 4 levels of GA 3 concentration (0.0 (as control), 125, 250, and 375 ppm) were sprayed over the plants and 2 levels of soybean genotypes (M 11 and L 17) were used for the experiment. The results showed that interactions between different levels of GA 3 and the soybean genotypes had significant effect on pod number per plant, seed number per pod, 1000-seed weight, and economic and biological yield ( p
