The side gauge wheels, which maintained a constant sowing
depth, were 60 mm 260 mm soft crowned gauge wheels
mounted vertically, at the same longitudinal position as the center
of the furrow openers and positioned so the lateral distance from
the inner side of the gauge wheel was 30 mm outboard of the
furrow opener. There were no side gauge wheels or wavy-edged
disc on the seeder before it was modified for no-till sowing. Down
force of all depth-control wheels was set at 750 N based on the soil
condition in this study.