Why are the farms in the western part of the Midwest larger?

Farms in the western part of the Midwest are larger due to factors like flat terrain, availability of fertile land, and the presence of large-scale commercial agriculture. These factors make it more feasible and cost-effective to operate larger farms in the western Midwest compared to other regions. Additionally, economies of scale and advancements in technology have also enabled farmers in this region to increase the size of their operations.