 We use both. A moldboard plow works great for plowing under sod (hay) feilds to put them back in corn. We've chiseled a few in the past and had poor results because the chisel doesn't turn under all of the alfalfa like a moldboard plow does.
In corn feilds though, they work great. We rent a 7-shank Brillion Soil Commander (disc chisel) from the local dealer. We did most of our fall tillage last weekend, with the exeption of 1 feild we are going to moldboard yet. It seems every body has a different opinion of what a chisel plow is. In our area, it's primary tillage only, not done after moldboarding like some have suggested. That's a feild cultivator. Chisel plows are defined by how many shanks, not how many feet wide they are, and all the ones I've seen used in our area have twisted shovels. There are other types of shovels, but for primary tillage that's what you generally want. In our soil, we pull either a 7 shank disc chisel, or a 4-16 moldboard plow with our Oliver 1855, which pushes 105 HP. Chisels cover more ground with less time and fuel, but are not ALWAYS the best answer. There are several factors to consider. What size tractor do you have? What are your soil conditions? How deep do you want to go? What are you going to be working up? If it's any kind of sod, I'd go with a moldboard plow the first time. After that, you can use the chisel plow here & there. Donovan from Wisconsin
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