A tillage implement includes a main frame with adjustable toolbarsections thereon which each support respective tillage units thereon forengaging theground. According to one aspect of the invention, the toolbar sections areangularlyadjustable about a pivot head at one end thereof while also being slidable inalongitudinal direction of the toolbar section to maintain alignment of thetillage units.The pivot head is elongate in a direction transverse to the toolbar section toresistmoments applied to the toolbar section by the tillage units engaging theground whilethe toolbar section remains adjustable. In another aspect of the invention,the tillageunits each comprise a trailing arm supporting the respective coulter disksthereon.The trailing arm is pivoted between two side plates fixed to the toolbarsection andbiased downward by a spring enclosed between the side plates to resist debriscatching on the spring.
