During three years (1972 to 1974), studies were conducted on the technique of crossing as well as on the genetic behavior of quantitative characteristics of soybeans [Glycine max (L.) Merr.] by means of crossing varieties. In growth chambers , greenhouses and in the open field, 3,282 crosses were made. The rate of successful crosses was 17.9%, 14.5% and 6.2%, respectively, for the different years.