Why would farmers In the middle produce surpluses they could sell?

Farmers in the Midwest produce surpluses due to the region's fertile soil, favorable climate, and advanced agricultural techniques. These factors enable high crop yields, allowing farmers to grow more than they need for personal consumption. Additionally, the development of efficient transportation networks helps them access larger markets, making it easier to sell excess produce. Ultimately, selling surpluses contributes to farmers' income and supports local economies.