"We were having trouble with skips and overlaps when spraying. We had a set of markers from an 8-row White planter and decided to try to make a sprayer out of them," says Lloyd Conner, who farms with his sons Wendell and Dale.

The men mid-mounted the marker arms on the frame of an older Allis Chalmers tractor and ran sprayer hose out to the ends of the arms. At the ends of the booms they ran a brace up from the marker disc to support an added piece of boom that keeps the spray line parallel to the ground.

The marker arms are raised and lowered by steel cable that runs through a series of pulleys to the rocker arms at the back of the tractor. Raising the rocker arms folds up the marker arm booms.

Spray power is provided by a pto-powered pump. A spray tank trails behind the tractor on a 4-wheel trailer. "We just leave 30 in. between the marks when spraying and we cover everything. Makes spraying much easier and the cost was minimal compared to a commercial spray rig," says Lloyd.