All I know is my location, Minnesota. Don't know where you are.
Here we would plow it in fall, all of it, and work it in spring with a field cultivator or maybe a disk.
Can spray it a week before plowing, or spray it in spring after the weeds and regrowth come up.
Here poor fall plowing is better than good spring plowing.
1. Yes, fall plowing helps it dry out in spring. One of the primary reason 95% of the land in my county gets fall tillage.....
2. I would not disk it first, plowing should be the big tillage, just wasting the disk. Unless you have something the disking should accomplish, what?
3. Good.
4. I would assume you are harvesting the hay, so there would not be a big deal on the 'green manure' portion. Modern study says for the green stuff you plow under, you expose about the same loss from the roots.... Either way, plowing under green plant will put a little N into the ground, 'here' in the cold winter it doesn't go away so would be little if any difference. 'Here' a proper seed bed and weed control is more important to good corn that if you save a couple lbs of N or not, so it would not be a concern of mine either way.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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