METHOD AND TOOTHED HARROW FOR SPRING HARROWING OF WINTER CROPS Russian patent published in 2005 - IPC

FIELD: agriculture, in particular, spring care for winter ear crops.

SUBSTANCE: method involves providing single-cut disk mellowing and crumbling of soil and simultaneously undercutting of weeds along rows or along diagonal line of geometric figures of field during cross drilling. Toothed harrow comprising frame and teeth built into frame. Teeth have mounting, core and curved working parts. Core part is made in the form of elliptical cylinder. Working part of each tooth is made in the form of elliptical cone with its base defined by core part of ellipse and its conical surface defining working side surface of tooth. Core and working parts of tooth have front and rear cutting edges extending along larger axes of ellipses. Mounting part of each tooth is disposed in harrow frame so that curvature of its working part and curvature of harrow advancement line are oriented in opposite directions. In case tooth working part is curved within the range of 15-30 deg relative to its vertical plane, thickness of cutting edges does not exceed 2 mm. Tooth core and working parts are made of equal length to facilitate effective crumbling of soil.

EFFECT: improved quality of soil owing to increased crumbling extent and substantially reduced damage to plants.

3 cl, 6 dwg, 2 tbl