It's no secret that farmers often make more money than they let on; especially farmers who have contracts to supply meat or vegetables to large restaurant firms or supermarkets. You're usually born into becoming a farmer or rancher, but that's not to say you can't learn the trade or find another way in as an agricultural manager.
That essentially gives you two ways into the lucrative trade. The farmers and ranchers will work their way up the hard way, doing years of hard physical labor before they reach the peak of their profession and end up owning the ranch or farm. An agricultural manager usually keeps their hands clean and works in an office. They'll be responsible for handling the business side of the operation, and will oversee the finances. In either case, you'll need a GED and at least five years of solid farmhand experience before you can start applying for the most lucrative positions.