FIELD: agricultural engineering. SUBSTANCE: distributing system is connected through Venturi connection 445 and auxiliary connection 455 to distributing pipes. Air flow created by means of fan is directed to seeding site. Venturi connection 445 and auxiliary connection 455 are coupled to one another in the vicinity of primary distributor 40. Auxiliary connection 455 is provided with auxiliary exit, through which seed material is directed past air flow in auxiliary connection to inlet end of Venturi connection. EFFECT: increased efficiency by providing variation of seed flow direction and enhanced reliability in operation. 10 cl, 26 dwg
