what is the difference between a harvester and a combine
Harvesters for combines are subdivided into platform and screw types. Platform harvesters are used for crops with long stalks. The platform of such a harvester is equipped with a belt or chain-and-cleat conveyor; the conveyor mechanism of a screw harvester is a screw.
Combines are used to harvest grains wheat oats ect. A swather is sometimes called a mower/conditioner it is used to harvest alfalfa hay. A combine separates the the grain from the stalk. Then grain is then hauled away to the grain silo. Hay, (cut by swather) lays where it is cut for a few days to cure then is baled.