After two years of research, the values of the controllable factors have been established that have a positive impact on the sowing quality of seeds of the French corn hybrids МАС47.Р and LG34.75. A correlation has been identified between the results of the laboratory and field studies after pre-sowing electromagnetic treatment of seeds of French corn hybrids. A good perspective for increasing the yield of corn grain is seen in the pre-sowing electromagnetic treatment of the seeds with the following controllable factors: voltage between the electrodes of the treating device U=1,65kV, duration of treatment τ=10s, and a rest of 14 days prior to sowing. Under the
described treatment, the obtained yield has increased by 22,5% compared to the reference specimen.