Iowa State University; Agricultural and Biosystems Engineering Dept.; Terracing; Soil conservation
Several individuals are using survey rods and transits to build terraces in a farm field. Another group of individuals and a tractor are in the background.
Iowa State University; Agricultural and Biosystems Engineering Dept.; Woodworking; Band saws
Several men are occupied in the construction of wooden structures. Their activities include: sawing, hammering and filing. A large band saw is at one side of the room. Its large wheels and most of the blade are enclosed in a wire safety...
Iowa State University; Agricultural and Biosystems Engineering Dept.; Combines (Agricultural machinery); Farmers; Crops; Harvesting; Agricultural wastes
Shown from the right rear, a self-propelled combine takes down crops in Washington County, Iowa, while simultaneously harvesting the grain in a cloud of dust.