Winnowing is a process by which

chaff Chaff (; ) is dry, scale-like plant material such as the protective seed casings of cereal grains, the scale-like parts of flowers, or finely chopped straw. Chaff cannot be digested by humans, but it may be fed to livestock, ploughed into soil ...

is separated from

grain A grain is a small, hard, dry fruit (caryopsis) – with or without an attached husk, hull layer – harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and ...

. It can also be used to remove pests from stored grain. Winnowing usually follows

threshing Threshing or thrashing is the process of loosening the edible part of grain (or other crop) from the straw to which it is attached. It is the step in grain preparation after reaping. Threshing does not remove the bran from the grain. History of ...

in grain preparation. In its simplest form, it involves throwing the mixture into the air so that the wind blows away the lighter chaff, while the heavier grains fall back down for recovery. Techniques included using a winnowing fan (a shaped

basket A basket is a container that is traditionally constructed from stiff Fiber, fibers, and can be made from a range of materials, including wood splints, Stolon, runners, and cane. While most baskets are made from plant materials, other materials ...

shaken to raise the chaff) or using a tool (a winnowing fork or shovel) on a pile of harvested grain.

In Greek culture

The winnowing-fan (λίκνον 'líknon'' also meaning a "cradle") featured in the rites accorded

Dionysus In ancient Greek religion and Greek mythology, myth, Dionysus (; ) is the god of wine-making, orchards and fruit, vegetation, fertility, festivity, insanity, ritual madness, religious ecstasy, and theatre. He was also known as Bacchus ( or ; ...

and in the

Eleusinian Mysteries The Eleusinian Mysteries () were initiations held every year for the Cult (religious practice), cult of Demeter and Persephone based at the Panhellenic Sanctuary of Eleusis in ancient Greece. They are considered the "most famous of the secret rel ...

: "it was a simple agricultural implement taken over and mysticized by the religion of Dionysus," Jane Ellen Harrison remarked. ''Dionysus Liknites'' ("Dionysus of the winnowing fan") was wakened by the Dionysian women, in this instance called '' Thyiades'', in a cave on Parnassus high above

Delphi Delphi (; ), in legend previously called Pytho (Πυθώ), was an ancient sacred precinct and the seat of Pythia, the major oracle who was consulted about important decisions throughout the ancient Classical antiquity, classical world. The A ...

; the winnowing-fan links the god connected with the

mystery religion Mystery religions, mystery cults, sacred mysteries or simply mysteries (), were religious schools of the Greco-Roman world for which participation was reserved to initiates ''(mystai)''. The main characteristic of these religious schools was th ...

s to the agricultural cycle, but mortal Greek babies too were laid in a winnowing-fan. In

Callimachus Callimachus (; ; ) was an ancient Greek poet, scholar, and librarian who was active in Alexandria during the 3rd century BC. A representative of Ancient Greek literature of the Hellenistic period, he wrote over 800 literary works, most of which ...

's ''Hymn to Zeus'', Adrasteia lays the infant Zeus in a golden ''líknon'', her goat suckles him and he is given honey. In the ''

Odyssey The ''Odyssey'' (; ) is one of two major epics of ancient Greek literature attributed to Homer. It is one of the oldest surviving works of literature and remains popular with modern audiences. Like the ''Iliad'', the ''Odyssey'' is divi ...

'', the dead oracle Teiresias tells

Odysseus In Greek mythology, Greek and Roman mythology, Odysseus ( ; , ), also known by the Latin variant Ulysses ( , ; ), is a legendary Greeks, Greek king of Homeric Ithaca, Ithaca and the hero of Homer's Epic poetry, epic poem, the ''Odyssey''. Od ...

to walk away from Ithaca with an oar until a wayfarer tells him it is a winnowing fan (i.e., until Odysseus has come so far from the sea that people don't recognize oars), and there to build a shrine to Poseidon.

China

In ancient China, the method was improved by mechanization with the development of the rotary winnowing fan, which used a cranked fan to produce the airstream. This was featured in Wang Zhen's book the '' Nong Shu'' of 1313 AD.

In Europe

Saxon The Saxons, sometimes called the Old Saxons or Continental Saxons, were a Germanic people of early medieval "Old" Saxony () which became a Carolingian " stem duchy" in 804, in what is now northern Germany. Many of their neighbours were, like th ...

settlements such as one identified in Northumberland as

Bede Bede (; ; 672/326 May 735), also known as Saint Bede, Bede of Jarrow, the Venerable Bede, and Bede the Venerable (), was an English monk, author and scholar. He was one of the most known writers during the Early Middle Ages, and his most f ...

's Ad Gefrin (now called Yeavering) the buildings were shown by an excavator's reconstruction to have opposed entries. In barns a draught created by the use of these opposed doorways was used in winnowing. The technique developed by the Chinese was not adopted in Europe until the 18th century when winnowing machines used a 'sail fan'. The rotary winnowing fan was exported to Europe, brought there by Dutch sailors between 1700 and 1720. Apparently, they had obtained them from the Dutch settlement of Batavia in Java, Dutch East Indies. The Swedes imported some from south China at about the same time and Jesuits had taken several to France from China by 1720. Until the beginning of the 18th century, no rotary winnowing fans existed in the West.

In the United States

The development of the winnowing barn allowed rice plantations in

South Carolina South Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders North Carolina to the north and northeast, the Atlantic Ocean to the southeast, and Georgia (U.S. state), Georg ...

to increase their yields dramatically.

Mechanization of the process

In 1737 Andrew Rodger, a farmer on the estate of Cavers in

Roxburghshire Roxburghshire or the County of Roxburgh () is a historic county and registration county in the Southern Uplands of Scotland. It borders Dumfriesshire to the west, Selkirkshire and Midlothian to the northwest, and Berwickshire to the north. T ...

, developed a winnowing machine for corn, called a 'Fanner'. These were successful and the family sold them throughout Scotland for many years. Some Scottish Presbyterian ministers saw the fanners as sins against God, for the wind was a thing specially made by him and an artificial wind was a daring and impious attempt to usurp what belonged to God alone.Chambers, Robert (1885)
''Domestic Annals of Scotland''
Edinburgh: W & R Chambers. p. 504. As the

Industrial Revolution The Industrial Revolution, sometimes divided into the First Industrial Revolution and Second Industrial Revolution, was a transitional period of the global economy toward more widespread, efficient and stable manufacturing processes, succee ...

progressed, the winnowing process was mechanized by the invention of additional winnowing machines, such as fanning mills.

References

External links

{{Wiktionary-inline, winnowing Harvest Separation processes Grain production sn:kuwurutsa ja:唐箕