75-585: The Royal Norfolk Show (more simply the Norfolk Show ) is an annual agricultural show , and is held by the Royal Norfolk Agricultural Association. It has been held almost every year since 1847. Shows were not held in 1866, 1911, 1934, 1957, 2020 nor 2021. Up until 1953, the show was held at various sites around Norfolk , although it has since been held at a permanent site near Costessey , Norwich , Norfolk . The show tends to be held on
150-461: A PIE stem * blōkó- , which supposedly gave Old Armenian peɫem "to dig" and Welsh bwlch "crack", though the word may not be of Indo-European origin. The basic parts of the modern plough are: Other parts include the frog (or frame), runner, landside, shin, trashboard, and stilts (handles). On modern ploughs and some older ploughs, the mould board is separate from the share and runner, so these parts can be replaced without replacing
225-570: A broken piece to be replaced. In 1833 John Lane invented a steel plough. Then in 1837 John Deere introduced a steel plough; it was so much stronger than iron designs that it could work soil in US areas previously thought unsuitable for farming. Improvements on this followed developments in metallurgy: steel coulters and shares with softer iron mould boards to prevent breakage, the chilled plough (an early example of surface-hardened steel), and eventually mould boards with faces strong enough to dispense with
300-487: A clumsy construction necessitated large plough-teams, and this meant that large areas of land had to be reserved as pasture. In China, where much less animal power was required, it was not necessary to maintain the mixed arable-pasture economy typical of Europe: fallows could be reduced and the arable area expanded, and a considerably larger population could be supported than on the same amount of land in Europe. The upper parts of
375-443: A field leaves a row of sods partly in the furrows and partly on the ground lifted earlier. Visually, across the rows, there is the land on the left, a furrow (half the width of the removed strip of soil) and the removed strip almost upside-down lying on about half of the previous strip of inverted soil, and so on across the field. Each layer of soil and the gutter it came from forms a classic furrow. The mould-board plough greatly reduced
450-431: A hydraulic cylinder on each bottom. When an obstruction is encountered, the plough bottom hinges back and up in such a way as to pass over the obstruction, without stopping the tractor and plough. The bottom automatically returns to normal ploughing position as soon as the obstruction is passed, without any interruption of forward motion. The automatic reset design permits higher field efficiencies since stopping for stones
525-533: A marked population increase, beginning around AD 1000. Before the Han dynasty (202 BC – AD 220), Chinese ploughs were made almost wholly of wood except for the iron blade of the ploughshare. These were V-shaped iron pieces mounted on wooden blades and handles. By the Han period the entire ploughshare was made of cast iron . These are the earliest known heavy, mould-board iron ploughs. Several advancements such as
600-674: A millennium. Major changes in design spread widely in the Age of Enlightenment , when there was rapid progress in design. Joseph Foljambe in Rotherham , England, in 1730, used new shapes based on the Rotherham plough, which covered the mould board with iron. Unlike the heavy plough, the Rotherham, or Rotherham swing plough consisted entirely of the coulter, mould board and handles. It was much lighter than earlier designs and became common in England. It may have been
675-404: A mouldboard plough: The share , landside and mould board are bolted to the frog, which is an irregular piece of cast iron at the base of the plough body, to which the soil-wearing parts are bolted. The share is the edge that makes the horizontal cut to separate the furrow slice from the soil below. Conventional shares are shaped to penetrate soil efficiently: the tip is pointed downward to pull
750-408: A mounted point is somewhere between the last two types. Makers have designed shares of various shapes (trapesium, diamond, etc.) with bolted point and wings, often separately renewable. Sometimes the share-cutting edge is placed well in advance of the mould board to reduce the pulverizing action of the soil. The mould board is the part of the plough that receives the furrow slice from the share. It
825-416: A plough body hits an obstruction are a cheaper overload protection device. Trip-beam ploughs are constructed with a hinge point in the beam. This is usually located some distance above the top of the plough bottom. The bottom is held in normal ploughing position by a spring-operated latch. When an obstruction is encountered, the entire bottom is released and hinges back and up to pass over the obstruction. It
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#1732859244063900-438: A ploughman could easily lift. This limited the construction to a small amount of wood (although metal edges were possible). These ploughs were fairly fragile and unsuitable for the heavier soils of northern Europe. The introduction of wheels to replace the runner allowed the weight of the plough to increase, and in turn the use of a larger mould-board faced in metal. These heavy ploughs led to greater food production and eventually
975-571: A rare collection of medals documenting the history of agricultural shows and rural industries across Australia. The 111 medals range in date from the mid-19th to the early 20th century and many are associated with significant individuals and organizations. Related to a show is the "field day", with elements of a trade show for machinery, equipment and skills required for broadacre farming. Field days typically do not involve livestock, show bags or sideshows , but may include events such as ploughing competitions not usually associated with shows due to
1050-932: A talk on insect control by an entomologist at a recent field day at LSU AgCenter's Pecan Research/Extension Station in Shreveport, La. A Landcare survey conducted in 1992/93 revealed that field days in Australia have a high value among local farmers. New Zealand's National Agricultural Fieldays is held annually in June at Mystery Creek , near Hamilton, New Zealand , and attracts 1,000 exhibitors and over 115,000 visitors through its gates. Smaller shows, held annually in New Zealand's towns and communities, are generally called agricultural and pastoral shows ( A&P shows ). Agricultural shows can be sources of swine influenza transmission in both animal and human populations. Swine influenza
1125-483: A variety of safety precautions that should be taken at agricultural fairs to prevent the spread of swine influenza. Vulnerable communities including children, people aged 65 years and older, pregnant women, and those suffering from long-term health conditions are groups who should avoid swine exposure due to their high-risk status. The CDC specifically recommends that high-risk individuals with known medical complications avoid interaction with swine at agricultural fairs. It
1200-495: A wooden, iron or steel frame with a blade attached to cut and loosen the soil. It has been fundamental to farming for most of history. The earliest ploughs had no wheels; such a plough was known to the Romans as an aratrum . Celtic peoples first came to use wheeled ploughs in the Roman era. The prime purpose of ploughing is to turn over the uppermost soil, bringing fresh nutrients to
1275-574: Is a communicable disease caused by one of several different strains of influenza A virus . Currently, the subtypes of influenza A virus which have been identified in pig populations within the United States are referred to as H1N1, H1N2, and H3N2, all named for their specific genetic makeups. These viruses are extremely common in pigs across various industries, including pig showmanship at agricultural fairs, and are easily passed between pigs when proper hygiene and safety measures are not carried out. It
1350-502: Is advised that anyone who develops flu symptoms after swine exposure at agricultural fairs contact their physician for appropriate medical consultation. There are other recommended prevention strategies to reduce the spread of swine influenza at agricultural fairs. It is suggested that people do not bring food into pig areas, do not take any items such as toys, pacifiers or similar items near the pig areas, avoid close contact with any pigs, and wash hands before and after handling pigs. Given
1425-462: Is exhibited), a trade fair , competitions, and entertainment. The work and practices of farmers , animal fanciers , cowboys , and zoologists may be displayed. The terms agricultural show and livestock show are synonymous with the North American terms county fair and state fair . The first known agricultural show was held by Salford Agricultural Society, Lancashire , in 1768. Since
1500-408: Is necessary to back up the tractor and plough to reset the bottom. This construction is used to protect the individual bottoms. The automatic reset design has only recently been introduced on US ploughs, but has been used extensively on European and Australian ploughs. Here the beam is hinged at a point almost above the point of the share. The bottom is held in the normal position by a set of springs or
1575-577: Is not practical on larger ploughs. When an obstruction is encountered, the spring release mechanism in the hitch permits the plough to uncouple from the tractor. When a hydraulic lift is used on the plough, the hydraulic hoses will also usually uncouple automatically when the plough uncouples. Most plough makers offer an automatic reset system for tough conditions or rocky soils. The re-set mechanism allows each body to move rearward and upward to pass without damage over obstacles such as rocks hidden below soil surface. A heavy leaf or coil-spring mechanism that holds
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#17328592440631650-452: Is practically eliminated. It also reduces costs for broken shares, beams and other parts. The fast resetting action helps produce a better job of ploughing, as large areas of unploughed land are not left, as they are when lifting a plough over a stone. Manual loy ploughing was a form used on small farms in Ireland where farmers could not afford more, or on hilly ground that precluded horses. It
1725-523: Is presumably why the standard Han plough team consisted of two animals only, and later teams usually of a single animal, rather than the four, six or eight draught animals common in Europe before the introduction of the curved mould-board and other new principles of design in the 18th century. Though the mould-board plough first appeared in Europe in early medieval, if not in late Roman, times, pre-eighteenth century mould-boards were usually wooden and straight (Fig. 59). The enormous labour involved in pulling such
1800-435: Is rare for the virus to spread to humans; however, genetic reassortment can lead to susceptibility among humans. Due to direct contact with infected animals or a contaminated environment, swine influenza strains can be transmitted to human populations. In cases such as the 2009 flu pandemic , the virus was transmitted from swine to humans and caused a global pandemic which led to the deaths of approximately 12,000 people in
1875-427: Is responsible for lifting and turning the furrow slice and sometimes for shattering it, depending on the type of mould board, ploughing depth and soil conditions. The intensity of this depends on the type of mould board. To suit different soil conditions and crop requirements, mould boards have been designed in different shapes, each producing its own furrow profile and surface finish, but essentially they still conform to
1950-430: Is the origin of the acre . The one-sided action gradually moved soil from the sides to the centre line of the strip. If the strip was in the same place each year, the soil built up into a ridge, creating the ridge and furrow topography still seen in some ancient fields. The turn-wrest plough allows ploughing to be done to either side. The mould board is removable, turning to the right for one furrow, then being moved to
2025-402: Is very short, except at the rear bottom of the plough. The heel or rear end of the rear land side may be subject to excessive wear if the rear wheel is out of adjustment, and so a chilled iron heel piece is frequently used. This is inexpensive and can be easily replaced. The land side is fastened to the frog by plough bolts. The frog (standard) is the central part of the plough bottom to which
2100-616: Is why they are called hand-ards . However, domestication of oxen in Mesopotamia and the Indus Valley Civilisation , perhaps as early as the 6th millennium BC, provided mankind with the draft power needed to develop the larger, animal-drawn true ard (or scratch plough). The earliest surviving evidence of ploughing has been dated to 3500–3800 BCE, on a site in Bubeneč , Czech Republic. A ploughed field, from c. 2800 BCE,
2175-474: The Debate between the hoe and the plough . In older English, as in other Germanic languages , the plough was traditionally known by other names, e.g. Old English sulh (modern dialectal sullow ), Old High German medela , geiza , huohilī(n) , Old Norse arðr ( Swedish årder ), and Gothic hōha , all presumably referring to the ard (scratch plough). The modern word comes from
2250-969: The Old Norse plógr , and is therefore Germanic, but it appears relatively late (it is not attested in Gothic ) and is thought to be a loan from one of the north Italic languages . The German cognate is "pflug", the Dutch "ploeg" and the Swedish "plog". In many Slavic languages and in Romanian the word is "plug". Words with the same root appeared with related meanings: in Raetic plaumorati "wheeled heavy plough" ( Pliny , Nat. Hist. 18, 172), and in Latin plaustrum "farm cart", plōstrum, plōstellum "cart", and plōxenum, plōximum "cart box". The word must have originally referred to
2325-409: The carruca heavy plough in Europe seems to have accompanied adoption of the three-field system in the later 8th and early 9th centuries, leading to improved agricultural productivity per unit of land in northern Europe. This was accompanied by larger fields, known variously as carucates , ploughlands, and plough gates. The basic plough with coulter, ploughshare and mould board remained in use for
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2400-432: The 1930s. Use of the traditional plough has decreased in some areas threatened by soil damage and erosion . Used instead is shallower ploughing or other less-invasive conservation tillage . The plough appears in one of the oldest surviving pieces of written literature, from the 3rd millennium BC, where it is personified and debating with another tool, the hoe , over which is better: a Sumerian disputation poem known as
2475-667: The 19th century, agricultural shows have provided local people with an opportunity to celebrate achievements and enjoy a break from day-to-day routine. With a combination of serious competition and light entertainment, annual shows acknowledged and rewarded the hard work and skill of primary producers and provided a venue for rural families to socialise. City shows also provide city people with an opportunity to engage directly with rural life and food production. Agriculture shows are often enlivened with competitive events, including sheaf tossing , show jumping , food competitions, and tent pegging . Demolition derbies and rodeos are popular in
2550-733: The US and campdrafting and wood chopping are often held in Australia. Studs are generally available for a fee. A livestock show is an event where livestock are exhibited and judged on certain phenotypical breed traits as specified by their respective breed standard . Species of livestock that may be shown include pigs , cattle , sheep , goats , horses , rabbits , llamas , and alpacas . Poultry such as chickens , geese , ducks , turkeys , and pigeons are also shown competitively. There are also competitive shows for dogs , sheepdogs , and cats . Prize-winners at agricultural shows are generally awarded inscribed medals, cups, rosettes or ribbons. The National Museum of Australia has
2625-504: The United States alone. For this reason, people who work or spend any time in close proximity with pigs are at risk for infection and must follow specific precautions to prevent the spread of swine influenza. Certain populations at agricultural fairs are at increased risk of developing serious complications after swine influenza exposure. For instance, pregnant women are more susceptible to swine influenza and have been shown to have increased rates of swine influenza mortality relative to
2700-696: The United States associated with contact with pigs at agricultural fairs. The three main Influenza A viruses responsible for these outbreaks are variants of the Influenza A viruses H1N1, H1N2, and H3N2. Recent swine influenza variant outbreaks associated with agriculture fairs in the United States: In the United States, agricultural fairs are a significant exposure source for swine influenza. Certain strains of swine influenza can be transmitted from pig to pig, pig to human, and human to human; swine influenza infection does not always show signs of illness. There are
2775-512: The Wednesday and Thursday in week 26 of the year. Attendances tend to be around 90,000 over the two days. [REDACTED] Media related to Royal Norfolk Show at Wikimedia Commons Agricultural show An agricultural show is a public event exhibiting the equipment, animals, sports and recreation associated with agriculture and animal husbandry . The largest comprise a livestock show (a judged event or display in which breeding stock
2850-452: The body in its working position under normal conditions resets the plough after the obstruction is passed. Another type of auto-reset mechanism uses an oil (hydraulic) and gas accumulator. Shock loads cause the oil to compress the gas. When the gas expands again, the leg returns to its working ploughing position after passing over the obstacle. The simplest mechanism is a breaking (shear) bolt that needs replacement. Shear bolts that break when
2925-508: The bottom of the shaft with bits of rope, which made them more fragile than the Chinese ones, and iron mould-boards did not appear in Europe until the 10th century. The first indisputable appearance after the Roman period is in a northern Italian document of 643. Old words connected with the heavy plough and its use appear in Slavic , suggesting possible early use in that region. General adoption of
3000-446: The coulter. By the time of the early 1900s, the steel plough had many uses, shapes and names. The "two horse breaking plough" had a point and wing used to break the soil's surface and turn the dirt out and over. The "shovel plough" was used to lay off the rows. The "harrow plough" was used to cover the planted seed. The "scratcher" or "geewhiz" was used to deweed or cultivate the crop. The "bulltongue" and "sweeps" were used to plough
3075-465: The cut formed by the coulter, turning over the soil to the side. The ploughshare spread the cut horizontally below the surface, so that when the mould board lifted it, a wider area of soil was turned over. Mould boards are known in Britain from the late 6th century onwards. There are multiple types of ploughs available. When a plough hits a rock or other solid obstruction, serious damage may result unless
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3150-461: The design. Using mathematical methods, he eventually arrived at a shape cast from a single piece of iron, an improvement on the Scots plough of James Anderson of Hermiston . A single-piece cast-iron plough was also developed and patented by Charles Newbold in the United States. This was again improved on by Jethro Wood , a blacksmith of Scipio, New York , who made a three-part Scots plough that allowed
3225-469: The fields were often cross-ploughed lengthwise and breadth-wise, which tended to form squarish Celtic fields . The ard is best suited to loamy or sandy soils that are naturally fertilised by annual flooding, as in the Nile Delta and Fertile Crescent , and to a lesser extent any other cereal -growing region with light or thin soil. To grow crops regularly in less-fertile areas, it was once believed that
3300-562: The first plough widely built in factories and commercially successful there. In 1789 Robert Ransome , an iron founder in Ipswich , started casting ploughshares in a disused malting at St Margaret's Ditches. A broken mould in his foundry caused molten metal to come into contact with cold metal, making the metal surface extremely hard. This process, chilled casting, resulted in what Ransome advertised as "self-sharpening" ploughs. He received patents for his discovery. James Small further advanced
3375-412: The frame carry (from the front) the coupling for the motive power (horses), the coulter, and the landside frame. Depending on the size of the implement, and the number of furrows it is designed to plough at one time, a fore-carriage with a wheel or wheels (known as a furrow wheel and support wheel) may be added to support the frame (wheeled plough). In the case of a single-furrow plough there is one wheel at
3450-597: The frame supporting the under-share (below-ground component). The heavy iron moldboard plow was invented in China 's Han Empire in the 1st and 2nd century, and from there it spread to the Netherlands , which led the Agricultural Revolution. The mould-board plough introduced in the 18th century was a major advance in technology. Chinese ploughs from Han times on fulfill all these conditions of efficiency nicely, which
3525-419: The front and handles at the rear for the ploughman to maneuver it. When dragged through a field, the coulter cuts down into the soil and the share cuts horizontally from the previous furrow to the vertical cut. This releases a rectangular strip of sod to be lifted by the share and carried by the mould board up and over, so that the strip of sod (slice of the topsoil ) that is being cut lifts and rolls over as
3600-603: The general population. Similarly, adolescents , infants , and those with serious medical comorbid conditions have disproportionately high rates of mortality with swine influenza. This is concerning as over 3.5 million children in the United States participate in youth agricultural programs every year. Agricultural fairs can readily lead to swine influenza infection in vulnerable populations because agricultural fairs are frequently visited by entire families, including children and pregnant women. Swine influenza variant viruses have been responsible for several recent outbreaks in
3675-472: The larger space required. In some communities in northern England Field Days (or Club Days ) have lost their agricultural character and have become community celebrations. The events are good sources of agricultural information, as organizers can arrange for guest speakers to talk on a range of topics, such as the talk on the yellow-flowering alfalfa at the South Dakota field day. Pecan growers were given
3750-470: The long sides and being dragged across the short sides without ploughing. The length of the strip was limited by the distance oxen (later horses) could comfortably work without rest, and their width by the distance the plough could conveniently be dragged. These distances determined the traditional size of the strips: a furlong , (or "furrow's length", 220 yards (200 m)) by a chain (22 yards (20 m)) – an area of one acre (about 0.4 hectares); this
3825-440: The middle of the rows. All these metal plough points required being re-sharpened about every ten days, due to their use on rough and rocky ground. The first mould-board ploughs could only turn the soil over in one direction ( conventionally to the right), as dictated by the shape of the mould board; therefore, a field had to be ploughed in long strips, or lands . The plough was usually worked clockwise around each land, ploughing
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#17328592440633900-571: The mould board. Abrasion eventually wears out all parts of a plough that come into contact with the soil. When agriculture was first developed , soil was turned using simple hand-held digging sticks and hoes . These were used in highly fertile areas, such as the banks of the Nile , where the annual flood rejuvenates the soil, to create drills (furrows) in which to plant seeds. Digging sticks, hoes and mattocks were not invented in any one place, and hoe cultivation must have been common everywhere agriculture
3975-403: The original plough body classification. The various types have been traditionally classified as general purpose, digger, and semi-digger, as described below. The land side is the flat plate which presses against and transmits the lateral thrust of the plough bottom to the furrow wall. It helps to resist the side pressure exerted by the furrow slice on the mould board. It also helps to stabilise
4050-410: The other components of the bottom are attached. It is an irregular piece of metal, which may be made of cast iron for cast iron ploughs or welded steel for steel ploughs. The frog is the foundation of the plough bottom. It takes the shock resulting from hitting rocks, and therefore should be tough and strong. The frog is in turn fastened to the plough frame. A runner extending from behind the share to
4125-536: The other is borne upside-down in the air. At the end of each row the paired ploughs are turned over so that the other can be used along the next furrow, again working the field in a consistent direction. These ploughs date back to the days of the steam engine and the horse. In almost universal use on farms, they have right and left-handed mould boards, enabling them to work up and down the same furrow. Reversible ploughs may either be mounted or semi-mounted and are heavier and more expensive than right-handed models, but have
4200-404: The other side of the plough to turn to the left. (The coulter and ploughshare are fixed.) Thus adjacent furrows can be ploughed in opposite directions, allowing ploughing to proceed continuously along the field and so avoid the ridge–furrow topography. The reversible (or roll-over) plough has two mould-board ploughs mounted back to back, one turning right, the other left. While one works the land,
4275-455: The plough is equipped with some safety device. The damage may be bent or broken shares, bent standards, beams or braces. The three basic types of safety devices used on mould-board ploughs are a spring release device in the plough drawbar, a trip beam construction on each bottom, and an automatic reset design on each bottom. The spring release was used in the past almost universally on trailing-type ploughs with one to three or four bottoms. It
4350-410: The plough moves forward, dropping back upside down into the furrow and onto the turned soil from the previous run down the field. Each gap in the ground where the soil has been lifted and moved across (usually to the right) is called a furrow. The sod lifted from it rests at an angle of about 45 degrees in the adjacent furrow, up the back of the sod from the previous run. A series of ploughings run down
4425-487: The plough to create the desired width of furrow. The share is a plane part with a trapezoidal shape. It cuts the soil horizontally and lifts it. Common types are regular, winged-plane, bar-point, and share with mounted or welded point. The regular share conserves a good cut but is recommended on stone-free soils. The winged-plane share is used on heavy soil with a moderate amount of stones. The bar-point share can be used in extreme conditions (hard and stony soils). The share with
4500-427: The plough while in operation. The rear bottom end of the landslide, which rubs against the furrow sole, is known as the heel. A heel iron is bolted to the end of the rear of the land side and helps to support the back of the plough. The land side and share are arranged to give a "lead" towards the unploughed land, so helping to sustain the correct furrow width. The land side is usually made of solid medium-carbon steel and
4575-406: The rear of the plough controls the direction of the plough, because it is held against the bottom land-side corner of the new furrow being formed. The holding force is the weight of the sod, as it is raised and rotated, on the curved surface of the mould board. Because of this runner, the mould board plough is harder to turn around than the scratch plough, and its introduction brought about a change in
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#17328592440634650-497: The severity of the disease, it is prudent to adopt safety precautions to limit the spread of the swine flu. Incomplete list of shows in Australia: Ploughing A plough or ( US ) plow (both pronounced / p l aʊ / ) is a farm tool for loosening or turning the soil before sowing seed or planting. Ploughs were traditionally drawn by oxen and horses but modern ploughs are drawn by tractors. A plough may have
4725-605: The shape of fields – from mostly square fields into longer rectangular "strips" (hence the introduction of the furlong ). An advance on the basic design was the iron ploughshare, a replaceable horizontal cutting surface mounted on the tip of the share. The earliest ploughs with a detachable and replaceable share date from around 1000 BC in the Ancient Near East , and the earliest iron ploughshares from about 500 BC in China. Early mould boards were wedges that sat inside
4800-442: The share into the ground to a regular depth. The clearance, usually referred to as suction or down suction, varies with different makes and types of plough. Share configuration is related to soil type, particularly in the down suction or concavity of its lower surface. Generally three degrees of clearance or down suction are recognised: regular for light soil, deep for ordinary dry soil, and double-deep for clay and gravelly soils. As
4875-457: The share wears away, it becomes blunt and the plough will require more power to pull it through the soil. A plough body with a worn share will not have enough "suck" to ensure it delves the ground to its full working depth. In addition, the share has horizontal suction related to the amount its point is bent out of line with the land side. Down suction causes the plough to penetrate to proper depth when pulled forward, while horizontal suction causes
4950-411: The soil must be turned to bring nutrients to the surface. A major advance for this type of farming was the turn plough, also known as the mould-board plough (UK), moldboard plow (U.S.), or frame-plough. A coulter (or skeith) could be added to cut vertically into the ground just ahead of the share (in front of the frog), a wedge-shaped cutting edge at the bottom front of the mould board with the landside of
5025-409: The stilt (handle) and the other a share (cutting blade) dragged through the topsoil to cut a shallow furrow suitable for most cereal crops. The ard does not clear new land well, so hoes or mattocks had to be used to pull up grass and undergrowth, and a hand-held, coulter -like ristle could be made to cut deeper furrows ahead of the share. Because the ard left a strip of undisturbed earth between furrows,
5100-407: The surface while burying weeds and crop remains to decay . Trenches cut by the plough are called furrows. In modern use, a ploughed field is normally left to dry and then harrowed before planting. Ploughing and cultivating soil evens the content of the upper 12 to 25 centimetres (5 to 10 in) layer of soil, where most plant feeder roots grow. Ploughs were initially powered by humans, but
5175-624: The three-shared plow, the plow-and-sow implement, and the harrow were developed subsequently. By the end of the Song dynasty in 1279, Chinese ploughs had reached a state of development that would not be seen in Holland until the 17th century. The Romans achieved a heavy-wheeled mould-board plough in the late 3rd and 4th century AD, for which archaeological evidence appears, for instance, in Roman Britain . The Greek and Roman mould-boards were usually tied to
5250-423: The time needed to prepare a field and so allowed a farmer to work a larger area of land. In addition, the resulting pattern of low (under the mould board) and high (beside it) ridges in the soil forms water channels, allowing the soil to drain. In areas where snow build-up causes difficulties, this lets farmers plant the soil earlier, as the meltwater run-off drains away more quickly. There are five major parts of
5325-492: The use of farm animals is considerably more efficient. The earliest animals worked were oxen. Later, horses and mules were used in many areas. With the Industrial Revolution came the possibility of steam engines to pull ploughs. These in turn were superseded by internal-combustion -powered tractors in the early 20th century. The Petty Plough was a notable invention for ploughing out orchard strips in Australia in
5400-591: The wheeled heavy plough, common in Roman north-western Europe by the 5th century AD. Many view plough as a derivative of the verb * plehan ~ * plegan 'to take responsibility' (cf. German pflegen 'to look after, nurse'), which would explain, for example, Old High German pfluog with its double meaning of 'plough' and 'livelihood'. Guus Kroonen (2013) proposes a vṛddhi -derivative of * plag/kkōn 'sod' (cf. Dutch plag 'sod', Old Norse plagg 'cloth', Middle High German pflacke 'rag, patch, stain'). Finally, Vladimir Orel (2003) tentatively attaches plough to
5475-402: Was also discovered at Kalibangan , India. A terracotta model of the early ards was found at Banawali , India, giving insight into the form of the tool used. The ard remained easy to replace if it became damaged and easy to replicate. The earliest was the bow ard, which consists of a draft-pole (or beam) pierced by a thinner vertical pointed stick called the head (or body), with one end being
5550-491: Was practised. Hoe-farming is the traditional tillage method in tropical or sub-tropical regions, which are marked by stony soils, steep slope gradients, predominant root crops, and coarse grains grown at wide intervals. While hoe-agriculture is best suited to these regions, it is used in some fashion everywhere. Some ancient hoes, like the Egyptian mr , were pointed and strong enough to clear rocky soil and make seed drills , which
5625-399: Was used up until the 1960s in poorer land. It suited the moist Irish climate, as the trenches formed by turning in the sods provided drainage. It allowed potatoes to be grown in bogs (peat swamps) and on otherwise unfarmed mountain slopes. In the basic mould-board plough, the depth of cut is adjusted by lifting against the runner in the furrow, which limited the weight of the plough to what
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