I am not sure how to do it, but some futures-plus arrangement might improve incentives - say sell your crop as a future, but with a (gov supported) price cap -

I am not sure how to do it, but some futures-plus arrangement might improve incentives - say sell your crop as a future, but with a (gov supported) price cap - so if the price goes through the roof the farmer gets a share of the overage. Not sure how much difference it will make but agriculture is kind of important