Journal or Book Title
Transactions of the ASAE
A moldboard plow was modified such that the ap-proach-angle of the bottoms could be varied and held at a given angle by a hydraulic cylinder. Field tests of this plow verified that good plowing performance could be obtained at high travel speeds when the bottoms were operated at an approach-angle less than the design approach-angle.
American Society of Agricultural Engineers
Wainwright, Raymond P.; Buchele, Wesley F.; Marley, Stephen J.; and Baldwin, William I., "A Variable Approach-Angle Moldboard Plow" (1983). Agricultural and Biosystems Engineering Publications. 134.