My dad started building terraces about 1940 with a one-way plow. You might not be familiar with a one-way, but it is a single string of disc set at an angle and you go round and round the field one-way, of course, since the plow moves the soil only one way. Dad made them going down and back numerous times to create a ridge(terrace). You can cut only the channel by deadheading back to the start. I understand you can do the same thing with a moldboard plow, but that is something we don't use around here in SW Kansas. I don't know how well it will work trying to moldboard numerous times the same soil.