Steve I will try to explain this the way it was told to me many many years ago. There are many diffrent types of soil around and as many diffrent types of coulters can be used. But I will keep it simple. The general purpose of the coulter is to cut through trash and cut the soil open so the bottom can simpley slice and lift and turn the soil over. A plow with the coulters set right will pull easer whan one without them. A plow without them will wear the points, shins and land sides faster than one that has them. Hear in the Mid-West (SW Ohio) we have so many diffrent types of soil from white ground to heavy clay to black gumbo and everything inbetween and they all plow diffrently but still need coulters to plow them right. Around us there are diffrent types of bottoms in use and that plays into how a plow works too. I wont have a plow without coulters myself but to each his own. Bandit
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