BROADCAST SOWING SHANK Russian patent published in 1999 - IPC

FIELD: agricultural engineering. SUBSTANCE: subsurface broadcast shank has conical disk mounted on shaft for rotation about it. Disk has lower edge formed as truncated cone with inclination angle of generatrices smaller than friction angle between soil and disk material. Projections on lower end surface of disk are arranged in asymmetry with respect to disk center. Projection ends are extending to level above furrow bottom. Brushes positioned within shank cavity have bristles whose ends define lines equally spaced from generatrices of upper conical surface of disk. EFFECT: increased sowing efficiency and simplified construction. 2 cl, 3 dwg