His comments reminded me of the competitive tension that exists between agricultural commodities. I thought about how an increase in the price of corn negatively impacts feeder calf prices, and about how margarine sales reduce the demand for butter, but increase the demand for soybean and sunflower oil. There are many examples. Crops compete for acres and for markets. Will it be chicken or beef for dinner? They are all agricultural commodities, produced by farmers and ranchers. But sometimes an increase in demand for one comes at the expense of another.