Virginia Tech, Extension Service2019-06-242019-06-241945-05-08http://hdl.handle.net/10919/90516Rear view of International Harvester Company A-Model, 2-disc plow constructing terrace (note side move action upon hitting small stone).4 x 5 inchesimage/jpegIn CopyrightApplied ScienceAgricultureVirginia Extension - Project 10Soil and Water ConservationErosion ControlTerracesPhotographBiological Systems Engineering, Virginia Tech