Simple solution. I like it. The farms around me bale up cornstalks for bedding in the fall. It would be as simple as using the bale wrap machines that they use to protect hay bales from the rain. They make huge round bales in a big plastic snake that sit outside. You could salt it and bury it and pay the farmers to bury their cornstalks.

As an organic farmer I know this would slowly deprive the soil of carbon - which would need to cause the farmers to use more and more chemical fertilizer, which is made using natural gas. So you might be robbing peter to pay Paul.

Could they just bury the corn waste without the plastic and salt!? That wouldn’t sequester carbon for a thousand years, but it would slow down decomposition