How is a miller in the middle ages an advantage to human and crops?
Also, in the Middle Ages, most farming was done on large manors–the land was owned by the local lord of the manor and he parceled out strips to the serfs, who owed him part of the crop lin return (like sharecropping) and also owed the lord labor several days a week on the land the lord kept for himself. The local mill was usually controlled by the lord and he could set the price the miller charged (taking a nice cut for himself) and forbid his serfs to have their grain ground at any other mill. So, milling may have had some advantages, like Louise said, but also helped the lord control his workers.