Heavy machinery

A combine harvester is a large machine that harvests grains such as wheat, oats and barley. The combine not only removes the grain heads from the stalks, but it also separates the individual grains themselves from the heads.
The combine harvester was invented in the United States in 1834, but a commercial version was invented in Australia in 1885.

A forklift, also called a lift truck, fork truck or forklift truck is a fairly small truck that has two prongs on the front that are designed to lift things. Forklifts are commonly used for moving large boxes around inside warehouses.

A tractor is a big vehicle usually driven by farmers. Tractors are used to pull ploughs and harvesters, and for pulling wagons full of hay or other loads. Tractors can be used for pulling other vehicles out of mud if they get stuck.
Tractors are designed to run on mud and dirt not smooth roads, which is why their back wheels are so big and have tyres with such deep tread.