I've tried all kinds of things. First, I don't plant corn by itself. I plant beans with a light mix of corn in them. I plant the corn for vertical cover not cobs and the cobs are long gone by the time the season hits. I also surface broadcast a cover crop of Crimson Clover, PTT, and Winter Rye into my standing beans. By Feb, all of my turnips are usually gone or the deer have plenty of mast crop instead. So, I typically mow the corn stalks in February so they lay on the ground and the microbes from soil contact speed decomposition. Because my clay soil is so low in OM, it can tend to glaze and cause problems. So, I run a tiller set very high. It terminates any leftover turnips before they can bolt, breaks any crusting, and does not really bother the WR or CC much. None of these really solve the issue. After each pass, I pretty much get out and check my tubes for clogging.
I have come to the conclusion that dead vegetation matter is worse than live. For example, one of the things I do with the drill is this. When a clover field get weedy after 7 years or so, I can get a few more years out of it by hitting it with 1 qt/acre glyphosate and then immediately drilling GHR or cereal into the clover. The gly top-kills the clover giving the GHR or cereal time to germinate and get a little ahead of the clover. Timing is important and you need good rain and cool evenings in the forecast. The clover then bounces back and fills in around the GHR and cereal. Grasses are killed by the gly and I can usually get 3 years more out of the clover before rotation is needed.
The point here is that when I do this, the drill never clogs. Drilling into the live clover field works great.
I believe mud scrappers are an option on the Versadrill. Since I bought mine used, they were not an option for me. They are welded on but I'm tempted to cut them off. They are intended to scrape mud from the openers. Well, if the openers are picking up mud, the field is too wet for me to plant anyway, so they don't do much good. It is generally dead debris that gets caught between the openers and the mud scrapers. This builds up and eventually gets under the planting shoe stopping seed flow. If your unit doesn't have mud scrapers, you may not have this issue.
I'm not sure if you read in my other posts, I solved many of the issues with a hydraulic top-link and a short chain between it and the drill. This does several things. The cultipacker sticks out so far behind the tractor, it doesn't provide more than a couple inches of ground clearance with my tractor when the toplink is set for planting. Shortening the top-link for transport and making turns when planting solves this and then I lengthen it when I set the drill down to plant. Another issue I had was that the manual says to lengthen or shorten the toplink to change planting depth. Well if I adjusted the planting depth correctly, it took pressure off the cultipacker and put more on the openers to get more depth so the seed didn't get covered. If I set it so the cultipacker had enough pressure to close the rows, it did not drill deep enough. The chain solves this an another problem all 3-pt drills have. They skip spots on uneven terrain. When I set the drill down to plant I lengthen the toplink enough so the chain relaxes. The drill then "floats" behind the tractor like a tow-behind drill. Since the drill conforms to the ground, there is even pressure between the openers and the cultipacker. I then add weight to the frame as needed to get the depth I want. The amount I need to add changes based on my soil conditions.
That hydraulic top-link solved a lot of things for me and it is also great for letting a bushhog or mower float. In addition, it makes hookup easier and quicker.
You may use the drill quite differently since you may be planting different crops with different techniques and strategies up north.
Thanks,
Jack