The Kansas land in my area can produce 40 bushels of soybeans per acre. Imagine how many people that can feed. Same land can produce over 600 pounds of fish or thousands of pounds of pears on a bad year or tons on a good year. My land is much better than I found it! Typically it produces 150+ large round hay bales in addition to my fruit , vegetables, and fish. That is a lot of cows used for beef or milk being fed with that brome! The organic material as you mention is the secret to higher production. The farmers who are stingy with the nutrients they apply to the farm will find the farm is stingy with them. When applied cow manure everyone said it’s unnecessary but what they grow and what I grow are different. Nutrient rich soil is good for orchards. Gmo grains you can grow anywhere which is what most farmers here grow.