In order to investigate the effect of intercropping on vigor of seed corn an experiment was conducted in complete randomized block design with four replications in the research labs of Gorgon University of Agricultural Sciences and Natural Resources. The treatment were including : four planting dates (May 4,May 19,June 4,June 19) and 3 planting rates (pure corn, 50 percent corn + 50 percent soybean and pure soybean).The characters including emergence percentage, electrical conductivity, dry weight, dry weight in cold test, germination speed, primary germination rate, growth speed and growth in cold test. The results showed with the delaying planting date in intercropping system was decreased all the characters (except electrical conductivity).
