I am looking at it different than you are. If each set of 3 cultivator sweeps is designed for a half row, then you are exactly right. It just seems strange to me that if this was say a 4 row cultivator, that it would have 6 sweeps/row. That seems excessive for a cultivator. Also, the width between the 2 sets of cultivator sweeps is fairly wide and not very close to the row. My prior cultivator had shanks much closer to the sides of the rows. Another reason why I thought it maybe a 2 row. I used to use a 6 row cultivator that had sets of sweeps for 6 rows and 2 additional outside half set of sweeps. The outside did onside of a row and when it turned, the other half was completed by the same outside set.
Your probably right and I am wrong. Just hadn't seen a 1 row cultivator. When I look at the picture again, the sweeps are not very wide which would also support a 1 row cultivator with 2 half sets.
Was that "sleeping operator" remark directed at me? Did you see my mistakes cultivating as a teenager? Those mistakes were hard hide - dead crop. I swear my father wanted to start cultivating when the crop was 2" high. I would literally crawl through the field at less than 2 mph. Any faster and the dirt would roll over the new crop. Tractor at a fast idle, radio blaring. Trying to recover from staying out too late the night before in my teenage years was not easy. Of course I had to catch up on my sleep while cultivating! Don't even mention hillsides. The cultivator would swing toward the downhill side and tried to counteract it by driving with the tractor tires right next to the crop. Haven't cultivated for many years. Now we use 1200gallon, 90' boom sprayer at 8-9 mph on Round up ready beans and corn. Can spray in a few days what previously took weeks with a cultivator. And yes, I occassionally still run over a little crop with the sprayer but not near as noticeable.