People who work on farms (look after livestock or grow food) are called farm workers.
Workers and/or employees who work from home are known as telecommuters.
A large farm that has many who workers who live on the land that they work is called a ranch. If the workers rent the land they work it could be called a tenant farm.
Union
The migrant workers are called migrant workers because they migrate. To migrate means to move. Migrant workers move from farm to farm, hoping to find work.
The food given to the queen by the workers is a secretion of the workers' hyperpharyngeal glands. It is called 'bee milk' or 'royal jelly'
Co-workers.
People who work in the GIS field are called knowledge workers because a knowledge worker is a person working in one of the information industries and the GIS is an information industry so knowlege workers work there.
Co-workers
Scabs(:
Guest workers have the right to work in a country but have few other rights.
co-workers