heavy and tractor-trailer truck drivers

Operating self-propelled equipment such as truck or tractor with trailer attached in the process of reaping, harvesting, threshing, swathing or winnowing grain and forage crops such as wheat, canola, soybeans, hay, milo, sunflowers, corn; Perform manual or mechanical adjustments to trucks, tractors, and trailers; Maintain and repair equipment and tools; Drive truck to transport crops to elevators, silos, or other storage areas; Drive equipment su ch as trucks, tractors, and trailers from one field to another.