Virginia Tech, Extension Service2019-06-242019-06-241946-03-27http://hdl.handle.net/10919/90514General view of surface of disk plow plot In background and turning plot in foreground. Note relative roughness4 x 5 inchesimage/jpegIn CopyrightApplied ScienceAgricultureVirginia Extension - Project 10Soil and Water ConservationLand DrainageStubble MulchPhotographBiological Systems Engineering, Virginia Tech