#$%^&*AU2012208978A120130221.pdf#####Abstract of the Disclosure A SUPPLEMENTAL DOWN FORCE SYSTEM FOR A GROUND WORKING IMPLEMENT WITH VARIABLE ROW UNIT 5 GROUPING AND IMPLEMENT WITH SAME A supplemental down force system for a ground working implement is provided where the supplemental downforce system groups the row units into at least two groups and provides a different supplemental down force to the row units in .0 each group. This enables the row unit to have a supplemental down force closer to the desired down force recognizing that the row units do not all operate in the same conditions. The controller periodically regroups the row units into the at least two groups and readjusts the down force.16A 18 70 16B 13 Fig. 1 16C 16D 10 16E 1 6H 16F 18 72 16G 18 . 16H 161 16J 1 18 ED - 68 16K 16L 16M 16N 7 18 160 18 16P
