Not at all. Again, farmer refers to the owner. This is echoed in the dictionary as well as what is written in law. The word people use for what you describe is

Not at all. Again, farmer refers to the owner. This is echoed in the dictionary as well as what is written in law. The word people use for what you describe is farmhand. It is the farmhand who works on a farm. The farmhand is the agricultural equivalent of a factory worker. Indeed, someone who owns a farm, but does not work on it, would not be considered a farmhand, but they most definitely would be a farmer. It is technically possible for one to be both a farmer and a farmhand, but being a farmer does not imply that one is also a farmhand. They are distinct roles.