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Threshing floor

Threshing floor is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Threshing floor rather than just read about it. In short: 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 use of a flail. A threshing floor is of two main types: 1) a specially flattened outdoor surface, usually circular and paved, or 2) inside a building with a smooth floor of earth, stone or wood where a farmer would thresh the gr…

Threshing floor — main illustration
Threshing floor — illustration

Key takeaways

  • Threshing floor belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Threshing floor to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Threshing floor from memory before moving on to harder problems.

Reference excerpt

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 use of a flail. A threshing floor is of two main types: 1) a specially flattened outdoor surface, usually circular and paved, or 2) inside a building with a smooth floor of earth, stone or wood where a farmer would thresh the grain harvest and then winnow it. Animal and steam powered threshing machines from the nineteenth century onward made threshing floors obsolete. The outdoor threshing floor was either owned by the entire village or by a single family, and it was usually located outside the village in a place exposed to the wind.

Structure of outdoor floors Outdoor threshing floors are usually located near a farm or farmhouse, or in places easily accessible from growing areas. They are usually paved with material that may be of various kinds, for example round stone cobbles about the size of a fist; slate; tile; or sometimes the underlying bedrock itself is exposed. Unpaved earthen threshing floors are also sometimes found. The floors usually have a slight slope, to avoid water standing on them after rain; and the paving may be divided by rays traced from a central focus to facilitate the pavement. To overcome possible unevenness, and isolate them from water running off after rain so helping to preserve them, threshing floors are often surrounded by a stout low wall. The construction was often in a high place, to take advantage of soft and steady winds to facilitate the work of winnowing, separating the grain from the chaff, once the threshing had been completed.

Structure of indoor floors

The central bay of a barn was the typical location of the threshing floor. Some large barns have two or even three threshing floors. The floors in barns may be packed dirt, stone, or a tightly fitted wood. To keep the grain from falling out the open doorway(s) a board was sometimes placed across the doorway called a threshold, but the term threshold was originally the floor itself or well foot-worn floor boards. Threshing in barns was mostly done by hand with a flail until threshing machines became available in the 19th century. The harvest could be stored in the barn and threshed during the winter. Barns may have a granary room or a separate granary building may have been used to store the threshed crop. A unique barn feature in some barns in parts of the northeast United States, called a swing beam, was designed for animals to walk in circles around a pole inside the barn pulling a device to thresh the grain instead of using a flail. The farm family could use the barn to their advantage in winnowing by standing in a doorway where a slight breeze is magnified by the wind passing around the building. Some barns had smaller winnowing doors to the rear of the threshing floor to concentrate the breeze even more than the big barn doors.

Use

Sheaves of grain would be opened up and the stalks spread across the threshing floor. Pairs of donkeys or oxen (or sometimes cattle, or horses) would then be walked round and round, often dragging a heavy threshing board behind them, to tear the ears of grain from the stalks, and loosen the grain itself from the husks. 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 cleansed by sieving.

Biblical references

The first biblical mention of the threshing floor is in Genesis 50:10. As such, it was not a shed, building, or any place covered with a roof and surrounded by walls, but a circular piece of ground from fifty to a hundred feet in diameter, in the open air, on elevated ground, and made smooth, hardy, and clean. Here the grain was threshed and winnowed. Two apparently coincident descriptive narratives are given in 2 Samuel 24:10–25 and 1 Chronicles 21:9–30 with regard to King David's purchase of the threshing floor on Mount Moriah (as well as Mount Moriah itself). In it, the Lord's directive to Gad, King David's prophet, was to instruct David to "rear an altar unto the Lord in the threshingfloor of Araunah the Jebusite" (2 Samuel 24:18–19 and 1 Chronicles 21:18–19).

References

External links Media related to Threshing floors at Wikimedia Commons

Illustrations

Threshing floor: A threshing floor on São Jorge
A threshing floor on São Jorge
Threshing floor: A threshing floor in Santorini in Greece
A threshing floor in Santorini in Greece
Threshing floor: Russian women using a hand powered winnowing machine in a barn.  Painting by K.V. Lebedev, The Floor, 1894.
Russian women using a hand powered winnowing machine in a barn. Painting by K.V. Lebedev, The Floor, 1894.
Threshing floor: Threshing and bagging grain in Germany in 1695
Threshing and bagging grain in Germany in 1695
Threshing floor: Work on the threshing floor in Gumuara (Ethiopia)
Work on the threshing floor in Gumuara (Ethiopia)

Worked examples

Example 1 — a first encounter with Threshing floor

Start with the simplest possible case. Write down what Threshing floor claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Threshing floor before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Threshing floor ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Threshing floor

In research
Threshing floor appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Threshing floor in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Threshing floor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Harvest, so understanding it makes those chapters shorter.
In everyday life
Look for Threshing floor outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Threshing floor in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Threshing floor means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Threshing floor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Threshing floor in simple terms?

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 use of a flail. A threshing floor is of two main types: 1) a specially flattened outdoor surface, usually ci…

Why does Threshing floor matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Threshing floor?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Threshing floor.

Tags

  • Harvest

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