threshing


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to threshing: threshing floor

threshing

or

thrashing,

separation of grain from the stalk on which it grows and from the chaff or pod that covers it. The first known method was by striking the reaped ears of grain with a flail. In another early method horses or oxen trod out the grain from stalks spread on a threshing floor. In both cases the straw was raked away and then the mixture of grain and chaff was winnowed, i.e., tossed into or poured through a current of air so that the light chaff was blown away from the heavier grain. In 1784 a Scotsman, Andrew Meikle, devised a threshing machine. Sheaves of grain were fed into a revolving cylinder armed with wooden beaters. Another toothed drum raked away the loose straw and pushed the remaining chaff and grain through a sieve onto a series of rollers that further separated the chaff from the grain in preparation for winnowing. The principle of Meikle's machine has been retained in all threshing machines up to and including the modern self-propelled combinescombine
, agricultural machine that performs both harvesting and threshing operations. Although it was not widely used until the 1930s, the combine was in existence as early as 1830.
..... Click the link for more information.
.

Bibliography

See M. Partridge, Farm Tools through the Ages (1973).

Threshing

 

separation of the seeds (or fruits) from the ears, tassels, heads, and cobs of plants. It is one of the basic operations in harvesting grain and other agricultural crops. It is performed by combines and threshers in the field and at the threshing floor and is usually combined with cleaning and grading of seeds (grain). The quality of threshing work is evaluated by the degree of completeness and the number of broken seeds and seeds that remain in the straw and chaff.

References in periodicals archive ?
First off, the accelerator cylinder of the APS Synflow system now feeds a 755mm diameter threshing drum that is 26% larger than the current design and has 10 rather than eight rasp bars.
It revealed in Survey conducted by reporter that area growers were using different types of machines for wheat harvesting and threshing. In Teshil Gujar Khan these wheat trashing machine harvester charging Rs.
* 59th Annual Steam, Gas & Threshing Show: 9 a.m.-5 p.m., Perry County Fairgrounds in Pinckneyville.
A change in the crop material feed rate affects the operation of the threshing, separating, and cleaning units.
This is not the first time a fundraiser has been organized around breaking a threshing machine world record.
The mean threshing efficiency was increased from 98% to 99%.
It was then hauled to a location of the farmer's choice to be stacked in large stacks and later be threshed by the threshing crew.
Effects of different beater- as spike-tooth, lama-tooth and wire loop-, and concave- PVC and chrome- types used in threshing of Cicer arietinum L.
"I found this old photograph of a threshing scene amongst my late father's collection.
A NEW autumn showcase for threshing machines and balers makes its debut this weekend in North Wales.
These were used to power machinery such as threshing machines, which removed grain from the ears of wheat.
Gabriel North; THRESHING THE COSMIC CHAFF: THE RECKONING OF A DEGENERATE WORLD; iUniverse (Spirituality) $13.95 ISBN: 9780595444007