How do we take our corn yields to the next level?

Question

We have set a record 3 years in a row with our corn crop. 2024 gave us a corn yield about 40 bushels over APH across our whole farm. I feel like we have a pretty good system for growing corn, so where do we go from here?
We farm mostly sandy soils with a lot of it that is poorly drained. We strip till most of our corn following soybeans. We run pop-up in furrow, liquid N 2x2x2, and then VR Y drop the remaining N around v5-v8. We spread AMS in the spring preplant to get our sulfur to last through the summer and we just started putting dry fertilizer in our strips this past fall (previously we broadcast dry fertilizer and then made strips). All of our corn gets sprayed with fungicide via airplane. We have done a little testing with Boron but had mixed results. 
Whats next? Where do we go from here?

Answer

I would say the next step is extensive tissue and sap testing followed by corrections either in season or the following season. (Assuming you've done what you can about drainage issues.)

You won't know what to add, how much, or if anything is in excess tying up other things unless you test.

Answer

What does your program consist of now to be able to get the 40 bu above ***?

Answer

IS it more important to to keep raising yield or do you also look at profit per acre?  If 60 to 90% of N never makes it to the plant, only 15% of P is accessible each year and K has similar numbers according to Dr. *************** and many other experts. Would it make sense to figure out how to make N, P & K available from soil and cut back on those inputs. I'm no expert but if 78% of air is nitrogen and I can access it and cut application rates that makes sense even if yield drops some but profitability goes up.

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How do we take our corn yields to the next level?

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