Three differences between threshing and winnowing
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Threshing: it is done by beating the sheaves againstthe wooden bars to separate the grains from the stalks. Winnowing: it is theprocess of removing the unwanted husk from the grains.
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Threshing:-
Threshing is the process of separation of grain from the stalk on which it develops and from the chaff or unit that covers it. In the process, the edible part of the crop is loosened but not the fiber part. It is done after harvesting and before winnowing. The technique that was used in old times was striking the harvested ears of grain with a thrash and this was done manually.
Winnowing:-
Winnowing is a farming method developed by ancient people for separating grain from the chaff. It is also used to remove weevils or other pests from stored grain. Threshing, which is the loosening of grain or seeds from the husks and straw, comes before winnowing.
In its simplest form, it involves throwing the mixture into the air so that the wind blows away the lighter chaff. The heavier grains fall back down for recovery.