I was muddying the water because the OP used the term disc PLOW when I believe he is using a disc harrow like the ones you posted.

Plow has become everyone's vernacular for anything that tills soil, but a disc PLOW is generally something more substantial -




They gave way to moldboards here, and likely in your neck of the woods too; the last ones I saw in operation were in Tamulipas.

ETA - talk about modern convenience, that's a switching two-way disc plow.

1999 time stamp. Haven't seen deep soil turning tillage since about that time anyway.

Lake Charles clay might suck that thing in, never to be seen again.

1999 NOT SO LONG AGO KIDDO.

We have fields that have been one way disced for their entire life as farming fields. I think all the good soil is now on the edges of the field and the rocks are in the middle. My grandfather would just leave a one-way in the corner for each field so you didn't to move plows from field to field. He would buy one-way plows at auctions just for the parts.

We just called the Nobel plows "sweeps", as well.