Yup. The regulations on food in the US is exactly to make sure the shelves stay stocked no matter what. Without such regulations, you'd experience random items being unavailable and price shocks.

One thing people often don't figure or realize is food takes time to grow. It requires long term thinking to make sure supplies are sufficient. Left to their own devices, farmers will often chase after last season's cash crop. That is bad. It's far better for farmers to stick to more predictable growing and for more dedicated incentives to be issued.