Check out any decent plowing reference on how to set your plow to mellow out the high and low spots. Shallow plowing to the outside will fill the opening furrows. You need to vary the depth with each pass or do a succession of shallow passes to move enough soil to the low spots. This is how you make contour ridges and how you can get rid of them. My farm has dead furrows that you can lose a horse in. Not wanting to work the whole field because it is 30+ years of CRP sod has me doing just this to fill the dead furrows and the opening furrows. Then I will just have strips of new seeding to keep the cows from pugging, can fence that with electric fence.
Mike
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