Animal Feed Supplement
Stan both Nutrien and Intrepid Potash sell supplements for animal feed. I've only been able to give a cursory look but it wasn't readily apparent to me how much revenue their supplement sales brought in.
Would this be something you'd have interest casting your expert eyes towards? It would be nice to know how much their selling as a rough framework for Verde. That's a big curiosity ask and you're obviously welcome to refuse.
For general awareness animal feed is routinely supplemented on farms. It's pretty analogous to humans taking a variety of supplements for whatever it is they're concerned about: a specific health issue, muscle development, growth, pregnancies, aging, etc