The economy of Iowa heavily relies on agriculture and related industries. When we include food manufacturing and the companies that make things farmers need, like machinery, these sectors provide a big chunk of Iowa's jobs and money. If we look at how much stuff linked to agriculture is sold (mostly to other places from Iowa), we can figure out exactly how many jobs in Iowa are tied to this industry. By doing this, we can estimate the total number of jobs in Iowa connected to agriculture and its related manufacturing.