A tool (10) assembly is provided for a planter row unit (12) and resides at the forward end of the row unit (12) beneath the tool bar (12, 14). The assembly includes a bracket assembly connected to the row unit (12), with a ground engaging tool (10) removably mounted on the bracket assembly for movement between raised and lowered positions. A linear actuator controls the position of the tool (10). The tool (10) may also include a depth control mechanism. Different tools can be interchanged on the bracket assembly.