COMBINED DRILL FOR CROP SOWING AND FORMATION OF RIDGES IN FIELD SURFACE Russian patent published in 1998 - IPC

FIELD: agriculture, in particular, equipment for cultivation of crops in periodically wetted heavy loamy soils, may be used in the fields, where basic and presowing treatment were performed. SUBSTANCE: combined drill has spherical disks arranged in pairs in front of shanks and adapted for cutting two-sided middle furrows and in single for cutting right- and left-sided outer furrows. Carrier and driving wheels are disposed behind spherical disks so that wheels roll over furrow bottom free from soil crumbs. Set of working tools is positioned on common frame. EFFECT: improved quality of ridges, reduced power consumption by effectuating simultaneously heating of furrows, seed sowing, rolling and ridge forming. 3 dwg