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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.
The process of loosening the chaff from the grain so as to remove it is called "threshing" before "drying" – traditionally done by milling or pounding, making it finer like "flour". Separating remaining loose chaff from the grain is called " winnowing " – traditionally done by repeatedly tossing the grain up into a light wind, which ...
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.
Sediment sorting is influenced by: grain sizes of sediment, processes involved in grain transport, deposition, and post-deposition processes such as winnowing. [3] As a result, studying the degree of sorting in deposits of sediment can give insight into the energy, rate, and/or duration of deposition, as well as the transport process responsible for laying down the sediment.
After this threshing process, the broken stalks and grain were collected and then thrown up into the air with a wooden winnowing fork or a winnowing fan. The chaff would be blown away by the wind; the short torn straw would fall some distance away; while the heavier grain would fall at the winnower's feet. The grain could then be further ...
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.
At first, artesans from Cantalejo travelled with large carts loaded with selected threshing boards, winnowing bellows, grain measures (of different traditional dry units: celemín is a wooden case with 4,6 L, cuartilla has 14 L, and fanega equivalent to 55.5 L...) and other implements for threshing or winnowing, which they peddled from town to ...