Virginia Tech, Extension Service2019-06-242019-06-241946-04-12http://hdl.handle.net/10919/90539View of FW2 recorder attachment. Feed roller (hollow brass tube 3/4 inch outside diameter) and bearing plate for roller in foreground4 x 5 inchesimage/jpegIn CopyrightApplied ScienceAgricultureVirginia Extension - Project 10Soil and Water ConservationLand DrainageWatershedPhotographBiological Systems Engineering, Virginia Tech