An air tractor was spotted flying over neighbors field of corn a few weeks ago. They do their work rather fast so are hard to photograph. This one is seeding cereal rye & field radish as a winter cover crop into standing corn. The rumble is the air tractor rent charge ranges from $ 9 to $ 14 per acre not counting the seed. Guessing the total operation might be $ 30 - $ 34 or so per acre. These cover increase fertility of the soil growing till ground freezes up then growing again next spring. The talk is fertilizer cost in 2022 is going be double what it cost in 2021. Some say a crimson clover will add 100 lbs N / acre as a winter cover. Do you think farmers will be taking a second look at planted winter cover to grow some fertility in the ground over winter and cut the cost of fertilize for crop production in the future ?