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The Goryachkin trihedral wedge theories describe soil flow over a surface resembling the wing of a sweep. The current study tested the Goryachkin crushing and lifting theories’ prediction of soil flow across a sweep by comparing with measurements from observed soil flow. Treatments included sweeps with three different rake angles (13.5, 16, and 44°) operated at three speeds (5, 7, and 9 km/h) and at two depths (50 and 100 mm). Flow direction was determined from scratch marks on the sweep surface.
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Hanna, H. Mark; Erbach, Donald C.; Marley, Stephen J.; and Melvin, Stewart W., "Comparison of the Goryachkin Theory to Soil Flow on a Sweep" (1993). Agricultural and Biosystems Engineering Publications. 637.