Question

how combine machine works ​

Answer 1

The grains fall through sieves into a collecting tank below. The unwanted material (chaff and stalks) passes along conveyors called straw walkers toward the back of the machine. More grain falls through into the tank. When the grain tank is full, a tractor with a trailer on the back pulls alongside the combine.

Answer 2

The modern combine harvester, or simply combine, is a versatile machine designed to efficiently harvest a variety of grain crops. The name derives from its combining three separate harvesting operations—reaping, threshing, and winnowing—into a single process. Among the crops harvested with a combine are wheat, oats, rye, barley, corn (maize), sorghum, soybeans, flax (linseed), sunflowers and canola. The separated straw, left lying on the field, comprises the stems and any remaining leaves of the crop with limited nutrients left in it: the straw is then either chopped, spread on the field and ploughed back in or baled for bedding and limited-feed for livestock.

Combine harvesters are one of the most economically important labour saving inventions, significantly reducing the fraction of the population engaged in agriculture.