Method and apparatus for utilizing a lower parallel planting arm

A method, comprising steps of:

• introducing a lower planting arm vertically below a set of upper planting arms of a row unit, the lower planting arm comprising:
• a first linkage arm having a first end and a second end opposite to the first end;
• a second linkage arm laterally opposite to the first linkage arm and having a third end laterally opposite to the first end of the first linkage arm and a fourth end longitudinally opposite to the third end and laterally opposite to the second end of the first linkage arm;
• a first bracket fixedly engaging with the first linkage arm and the second linkage arm at a first position that is between the first end and the third end;
• and
• a second bracket fixedly engaging with the first linkage arm and the second linkage arm at a second position opposite to the first position that is between the second end and the fourth end;
• pivotally engaging the lower planting arm and a mounting plate of a row unit with one another by at least one attachment assembly;
• pivotally engaging the lower planting arm and a head frame of the row unit with one another by at least another attachment assembly;
• and
• selectively engaging an actuating device with the lower planting arm at the first bracket of the lower planting arm or at the second bracket of the lower planting arm.