Sod harvesters have used a variety of methods to follow the contour of the ground; in general, the objective is to allow the operator to cut a thin strip of sod without the risk of scalping, or cutting too thinly on occasion. Some harvesters, commonly referred to as “conventional” or “fixed head” harvesters, have the cutting head rigidly connected to the conveyor frame. Examples of this type of harvester are the harvester described in U.S. Pat