Mornin' Guy, It is kinda hard to explain unless you are familiar with flood irrigation. The land is so darned flat; ideally, it will have a slope of roughly 3' to a 1000 foot run. As a consequence of this flat irrigation farming, the seedbed must almost totally level so that the water will follow the furrow from headland to drain-water as it should. Therefore, when plowing, there can be no dead furrows, there can be no "holes" or “mounds” and there can be no "trash" left on the surface because these things would impede the flow of the water. You need to either plow in both directions, or you must plow the whole entire farm, traveling in one direction only. In short, "normal" plows just do not work well in this environment. I think John Deere originally came out with the dual-direction plows, then came the tumble plows and finally the spinners, or as you call 'em, the rollovers. They allow plowing in both directions without ever changing the 'throw direction' of the soil. Also, and as a result of using these types of plows, we that are used to 'em think that the little one-way plows are the silliest thing ever dreamed up by mankind, because with the spinner, you can cover so much real estate faster and there is no lost motion from running back and forth across the headland. :>) Allan
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