In certain condition of work, for saving energy (flue, labour, time, equipments etc.) it is recommended to do soil tillage and fertilization at one passage, achieving a corresponding degree of charging the tractor power. Working qualitative indices in combined works are superior, as a result of totalizing the effects of each work. The advantages of using a combined unit, which at one passage does soil breaking up. Fertilization and preparation of the germinative bed. were: the real flue consumption at hectar decrease by 3-4 times; the real working increase by 2-3 times.