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Rice winnowing, Uttarakhand, India Winnowing in a village in Tamil Nadu, India Use of winnowing forks by ancient Egyptian agriculturalists. Winnowing is a process by which chaff is separated from grain. It can also be used to remove pests from stored grain. Winnowing usually follows threshing in grain preparation. In its simplest form, it ...
In sedimentology, winnowing is the natural removal of fine material from a coarser sediment by wind or flowing water. Once a sediment has been deposited, subsequent changes in the speed or direction of wind or water flowing over it can agitate the grains in the sediment and allow the preferential removal of the finer grains.
Winnowing, used to separate the rice from hulls, is to put the whole rice into a pan and throw it into the air while the wind blows. The light hulls are blown away while the heavy rice fall back into the pan.
A Japanese winnowing basket (2007) A winnowing basket or fan is a tool for winnowing grain from chaff while removing dirt and dust too. [1] They have been used traditionally in a number of civilizations for centuries, [2] and are still in use today in some countries.
Russian women using a hand powered winnowing machine in a barn. Painting by K.V. Lebedev, The Floor, 1894 Threshing and bagging grain in Germany in 1695 Threshing (thrashing) was originally "to tramp or stamp heavily with the feet" and was later applied to the act of separating out grain by the feet of people or oxen and still later with the ...
A winnowing fork. This verse describes wind winnowing, the period's standard process for separating the wheat from the chaff. Ptyon, the word translated as winnowing fork in the World English Bible is a tool similar to a pitchfork that would be used to lift harvested wheat up into the air into the wind.
Separating remaining loose chaff from the grain is called "winnowing" – traditionally done by repeatedly tossing the grain up into a light wind, which gradually blows the lighter chaff away. This method typically uses a broad, plate-shaped basket or similar receptacle to hold and collect the winnowed grain as it falls back down.
By the addition of rakes, or shakers, and two pairs of fanners, all driven by the same machinery, the different processes of thrashing, shaking, and winnowing are now all at once performed, and the grain immediately prepared for the public market. When it is added, that the quantity of grain gained from the superior powers of the machine is ...