If you can predict "the price of hens is about to drop" more reliably than the market can, that would make you exceptionally rare. And if you don't already know and have evidence that you can make such predictions reliably, the safe bet is that you can't. Many people try, and fail, and end up buying high and selling low.
Similarly, if someone is planning on planting SOY, I'd try to talk them out of it.
Would you seriously not try to talk someone out of planting soy?