You can see tractors in construction sites all the way to farms; however, the tractor was invented to do farm work, so that’s its main use.
Tractors on a farm are used for plowing and pulling trailers. The farm tractors usually have five pedals and one clutch on the left side. These pedals are used to control the traction of the tractor, its acceleration, and its braking. There’s actually two pedals used for breaking; one of them is to be used in soft dirt or loose mud and the other is to control spins from the loss of traction. The fifth pedal is used to operate the differential lock to prevent the tractors’s wheels to sleep. Most cars also have this option, but they don’t need a pedal for the slip, however a tractor’s working conditions are harsher than a car, so it needs a lock to prevent the wheel slip. The last pedal is for the throttle, which controls the speed of tractor. Unlike cars, tractors also have a hand lever for the throttle, it can be used increase speed or reverse. Truly with five pedals and a clutch, the tractor operate has his hands full.
Non-farm tractors are usually called backhoe loaders. They often times not only have the ability to pull heavy loads, but have a claw to excavate and dig up dirt. They will be covered in the backhoe section of this site.