For example, in Europe farmers can get the money from the EU, but only if they use certain seeds. So basically there are a couple of crops to choose from that get repeated year by year. What happens to the soil is a great disaseter. Obviusly nobody can use more natural kinds of fertilizers these days and the food gradually loses its nutrient value. The farmers are happy about announcing their bio certification but very few actually care about what happens to the soil. A similar "optimization" is being done with animal farming. It's disgusting and very far from actual progress.