Plow or plough, agricultural implement used to cut furrows in and turn up the soil, preparing it for planting. The plow is generally considered the most important tillage tool. Its beginnings in the Bronze Age were associated with the domestication of draft animals and the increasing demand for food resulting from the rise of cities. The plow is depicted on Egyptian monuments, mentioned in the Old Testament, and described by Hesiod and Vergil. The early plow consisted simply of a wooden wedge, tipped with iron and fastened to a single handle, and a beam, which was pulled by men or oxen. Such implements were capable of breaking but not of inverting the soil. The plow evolved gradually until c.1600, when British landlords attempted greater improvements. The first half of the 18th cent. saw the introduction into England of the moldboard, a curved board that turns over the slice of earth cut by the share. Important improvements in design and materials were made in the early part of the 19th cent. They included streamlined moldboards, replaceable shares, and steel plows with self-scouring moldboards. Standardized by 1870, the modern moldboard plow has been improved by various attachments, e.g., the colter, a sharp blade or disk that cuts the ground in advance of the share. In 19th-century America horses largely replaced oxen for drawing plows. Tractors now supply this power in most developed parts of the world. With more powerful tractors, larger plows have come into use. Among the various types of plows in use today are the reversible two-way plow for contour plowing; listers and middlebusters, which prepare shallow beds; the disk plow, whose revolving concave disks are useful in working hard or dry soil; the rotary plow, with an assembly of knives on the shaft that mix the surface growth with the soil; and the chisel plow, with points mounted on long shanks to loosen hard, dry soils and shatter subsurface hardpan. The plow often symbolizes agriculture, as in the great seals of New Jersey, Pennsylvania, Tennessee, and other states.
Plough often used emblematically, as in follow the plough meaning be a ploughman or farmer.
From late Middle English, the Plough has been the name given to a prominent formation of seven stars in the constellation Ursa Major (the Great Bear), containing the Pointers that indicate the direction to the Pole Star. Also called (in North America) the Big Dipper and (formerly, in Britain) Charles’s Wain.
plough a lonely furrow carry on without help or companionship. The earliest recorded form of this phrase is found in a speech by Lord Rosebery of July 1901.
Plough Monday the first Monday after Epiphany, formerly marked by popular festivals or observances in some regions, especially the north and east of England, named from the custom of dragging a plough through the streets to mark the beginning of the ploughing season.
ploughshare the main cutting blade of a plough, often with biblical allusion to Isaiah 2:4 (see beat swords into ploughshares).
plough the sands undertake an impossible or pointless task; first recorded in Robert Greene’s Never Too Late (1590).
Tractor Agriculture is going to demonstrate topic called What is a Plough inside out today. When i was 14 years old, I went with my father to the fields and saw many types of new tools. We will today discuss about an important Agricultural Equipment which cannot be ignored.
This is going to be a single resource article having all the knowledge needed to understand this tool.
A Plough or Plow is an Agricultural Implement which is used to cut the soil and make it suitable for the process called seed sowing.
Before sowing the seeds into the field, it is paramount to make the field suitable. To accomplish this, different types of ploughs are used nowadays.
What is the Advantage of using Plough? The major reasons are listed below:
- The first reason is to accomplish deeper seed level for efficient penetration.
- It adds more humus and fertility to the soil by covering vegetation and minerals.
- It destroys the unwanted weeds.
- It gives the soil the condition to breathe easily and air can easily pass through the soil.
- The seeds are able to establish good contact with the soil.
- The insects and their eggs are destroyed.
- The surface reaches to such a condition in which the erosion by wind is a rare possibility.
Now we have learnt the major advantage of a plough, let us discover the right time to Plough.
This is very important research task and the yield of crop generally depends upon quality of seed bed and time of start.
There are many factors which should be taken care of during this process. These points are:
During rainy season, if early ploughing is done, it helps in retaining the crop and minimizes unwanted weeds. These weeds later become manure which ultimately results in overall benefit.
Types of Ploughs
There are different types of Ploughs available to match various types of soil structures. These different types are listed below:
- Mould Board Plough
- Disc Type Plough
- Rotary Plough
- Chisel or sub surface Plough
- Sub Soiler Plough
In the older times, wooden plough was used mostly but in the recent times steel versions are used everywhere.
The MouldBoard version cut the furrow slices into pulverised form. The main use of this tool is to cover vegetables and green manure crops. It is also used for inverting grass into the soil after rainfall.
There are different types of MouldBoard Ploughs like:
- Semi Mounted
These versions are further sub divided into:
- One-Way Version
- Two Way Version
Trailed Mould Boards
It is also called as pull type mouldboard plough and is supported on 2 or 3 wheels.
Single Bottom Plough
This type of setting is maintained on 2 wheels and a land wheel. A screw jack and hydraulic cylinder are also involved in integration.
Gang Mould Board
This type has between 2 to 5 bottoms. To lift this plough, a power lift or screw jack or hydraulic cylinders are used which can easily raise or lower the plough.
They are also called as direct mounted or tractor mounted ploughs. They are attached to a Tractor and Tractor lift is used to raise or lower them. When this implement is lifted, the whole load is managed by the Tractor itself.
One Way Plough
These types of implements direct the soil in a particular direction when seen from behind.
Two Way Plough
This type has 2 type of bottoms i.e. left and right. These kinds of Ploughs are very popular nowadays and are the preferred choice for irregular land.
The name resembles the structure of this implement. It is in the form of a disc i.e. DISK (concave shape). They were used in order to reduce the friction. This Plough cannot be used at greater speeds as cutting process requires slow speed. Compared to Mould Board, Disk Plough has lesser maintenance cost.
Disc Plow can easily be used in conditions where mouldboard plow cannot be used. These conditions are listed below:
The soil that is sticky in nature.
- The land that is dry and hard.
- Disc Plough can easily move over the stones.
- Disk Plow is very effective after crop harvesting and ground being hard.
- They are mostly used for deep ploughing.
- The life span of a Disk Plough is greater in abrasive soil as compared to Mould Board Plow.
Types of Disc Ploughs
The Disc Plows can generally divided into 2 categories. They are:
- Bullock Based
- Tractor Based
There are different parts that constitute a Disk Plow. They are:
- Hitch Bolt
- Disk Scraper
- Disk Hub
- Rear Furrow Wheel
- Beam or Frame
- Lift Crank
Bullock Drawn Plough is divided into 2 types. These are i) Sulky and ii) Gang Type.
The Tractor based Disc Plow is divided into 3 types namely:
- i) Direct Mounted
- ii) Semi Mounted
iii) Trailing Type.
Rotary Hoe or Rotary Plough
This type of plough is very popular nowadays due to their specific use in seed bed preparation. The cutting of soil is done by steel tines or blades. The Rotary Hoes are of 3 types.
In this type of setting, Tractor pulls the rotary hoe and auxiliary engine is attached to supply power. The blades are made to run using this integration.
These are mounted on tractors and PTO shaft manages the running process.
These type of hoes are usually driven by own engine and are effective in small farms or gardens where the operator walks along side.
Tractor Mounted and Self Propelled plough varieties are mostly used.
In Tractor Mounted Implements, power from tractor rear PTO shaft is transmitted by a propeller shaft to the gearbox through a dog clutch which is handled by a hand lever.
Power from gearbox is transmitted to sprocket for moving the rotor shaft. The rotors have sharp edged blades fitted on them.
Types of Tilth
The type of tilth can be controlled by the machine. These factors affect the type of tilth:
i) The type of soil.
ii) The speed of Tractor and machine.
iii) The Moisture Content of soil.
Depth of Cut
The machine can easily cut to a depth of 9” but it is advisable to make a cut of 5” on starting so that machine overloading can be avoided.
Chisel or Sub Surface Plough
The chisel plow is used at shallow depths and areas where we do not want to turn the soil. Their primary use is to loosen hard dry soil. This implement is mostly used for reclamation of land which has not been used for Agriculture.
They are similar to Chisel Ploughs but are rigid and heavy duty in nature. SubSoiler can shear land up to depth of 36”. This process requires a lot of machine power, so Tractors with power range between 100hp-200hp are used for these types of Ploughs.
Heavy Sub Soiler implements are mostly used for the land reclamation. This implement is used for water conversation on hill slopes and hill side fields and also to improve wet areas drainage.
PLOUGH AND PLOUGHING. To enable the soil to grow good crops the upper layer must be pulverized and weathered. This operation, performed in the garden by means of the spade, is carried on in the field on a larger scale by the plough,’ which breaks the soil and by inverting the furrow-slice, exposes fresh surfaces to the disintegrating influence of air, rain and frost. The first recorded form of plough is found on the monuments of Egypt, where it consists simply of a wooden wedge tipped with iron and fastened to a handle projecting backwards and a beam, pulled by men or oxen, projecting forwards. Many references to the plough are found in the Old Testament, notably that in 1 Sam. xiii. 20: ” All the Israelites went down to the Philistines to sharpen every man his share and his coulter.” Descriptions of ploughs found in Hesiod’s Works and Days and in Virgil’s Georgics i. 169-175, show little development in the implement. The same may be said of the Anglo-Saxon ploughs. These are shown with coulter and share and also with wheels, which had in earlier times been fitted to ploughs by the Greeks and also by the natives of Cis-Alpine Gaul (Pliny, His& nat. 18, 18). A mattock with which to break the clods is often found represented in Anglo-Saxon drawings as subsidiary to the plough. All these types of plough are virtually hoes pulled through the ground, breaking but not inverting the soil. In the first half of the 18th century a plough with a short convex mould-board of wood was introduced from the Netherlands into England and, as improved at Rotherham in Yorkshire, became known as the Rotherham plough and enjoyed considerable vogue. At this period ploughs were made almost wholly of wood, the mould-board being cased with plates of iron. Small, of Berwickshire, brought out a plough in which beam and handle were of wrought The O. Eng. form is pjoh, which is usually found in the sense of ” plough-land,” a unit for the assessment of land (see HIDE), the regular O. Eng. word for the implement being sulh, still found in some dialects in the form sull. It appears in many Teutonic languages, cf. Du. ploeg, Ger. Pflug, Swed. plog, Dan. ploy. The Slavonic forms, such as Russ. or Pol. plug, are borrowed from the German. It does not appear in Gothic, where the word used is hoha. The ultimate origin of ” plough ” is unknown. Max-Muller (Science of Language, i. 296) connects the word with the Indo-European root meaning ” to float,” seen in the Gr. ,rXorov, a boat or ship; the same word would be applied to the ship ” ploughing ” through the waves, and to the implement ” ploughing ” through the earth. A Celtic origin has been suggested, connecting the word with Gael. ploe, stump of a tree, as forming the original plough. The form ” plow ” was common in English until the beginning of the 18th century, and is usual in America.iron, the mould-board of cast iron. The shares, when made of the same material, required constant sharpening; this necessity was removed by the device, patented by Robert Ransome in 1803, of chilling and so hardening the under-surface of the share; the upper surface, which is soft, then wears away more quickly than the chilled part, whereby a sharp edge is always assured. Nowadays the mould-board is of steel with a chilled and polished surface to give greater wearing qualities and to reduce friction. In the latter part of the 19th century there were numerous improvements but no fundamental alterations in the construction of the ordinary plough. The working parts of the plough are the coulter, the share, and the breast or mould-board. These are carried on the beam, to which are attached the handles or tilts at the back, and the hake or clevis and draught-chain at the front. The hake is notched so that, by moving the draught-chain higher or lower thereon, the plough is caused to go more or less deeply into the ground. It may also be adjusted to suit the height of the horses used. The hake moves laterally on a quadrant and it is thus possible to give the plough a tendency to left or right by moving the hake in the reverse direction. A frame is bolted to the beam and this carries the breast or mould-board to the fore-end of which the share is fitted. The side-cap, a plate of Newcastle Plough. iron fixed to the land-side of the frame, is intended to keep the edge of the unploughed soil vertical and prevent it from falling into the furrow. A piece of iron called the slade is bolted to the bottom of the frame, and this, running along the sole of the fur-row, acts as a base to the whole implement. The coulter (either knife or disk) and sometimes a skint-coulter (or jointer) are attached adjustably to the beam, so as to act in the front of the share. The coulter is a knife or revolving disk which is fixed so that its point clears the point of the share. The skim-coulter is shaped like a miniature plough, substituted for or fixed in front of the coulter; it is used chiefly on lea land, to pare off the surface of the soil together with the vegetation thereon, and turn it into the previous furrow, where it is immediately buried by the furrow slice. Two wheels of unequal height are commonly fitted to the front of the beam. By means of them the depth and width of the furrow are regulated, whereas in the case of ” swing ” or wheelless ploughs these points depend chiefly on the skill of the ploughman. In the wheeled plough some of the weight and downward pull due to its action on the ground is taken by the wheels; the sliding friction is thus to some extent converted into a rolling friction, and the draught is correspondingly diminished. In operation the coulter makes a perpendicular cut separating the furrow-slice which is divided from the ” sole ” of the furrow Crested Furrow. Rectangular Furrow. by the share and then inverted by the curve of the breast as the. plough moves forward. The process is indicated in the illustra- tion of different types of furrow. The form of a furrow is regulated by the shape and ‘width of the share, working in combination with a proper shaped breast. A ” crested ” furrow is obtained by the use of a share, the wing of which is set at a higher altitude than the point, but this type of furrow Wide Broken Furrow. is less generally found than the ” rectangular ” form obtained by a level-edged share, which leaves a flat bottom. During the greater part of the loth century the ideal of ploughing was to preserve the furrow-slice unbroken, and this object was attained by the use of long mould-boards which turned the Digging Plough. slices gently and gradually, laying them over against one another at an angle of 450, thus providing drainage at the bottom of the furrow, and exposing the greatest possible surface to the influences of the weather. Subsequently the digging plough came into vogue; the share being wider, a wider furrow is cut, while the slice is inverted by a short concave mould-board with a sharp turn which at the same time breaks up and pulverizes the soil after the fashion of a spade. Except on extremely heavy soils or on shallow soils with a subsoil which it is unwise to bring upon the surface, the modern tendency is in favour of the digging plough. A ploughed field is divided into lands or sections of equal width separated by furrows. On light easy draining land 22 yds. is the usual width; on the heaviest lands it may be as little as s yds., and in the latter case the furrows will act as drains into which the water flows from the intervening ridges). Certain important variations of the ordinary plough demand consideration. The one-way plough lays the furrows alter-counteract the tendency for the soil to work down the slope. One-way ploughs also leave the land level and dispense with the wide open furrows between the ridges which are left by the ordinary plough. They are made on different principles. One type comprises two separate ploughs, one right hand and one left, which revolve on the beam, one working, while the other stands vertically above it. In another the mould-board and Balance Plough. share are shaped so that they can be swung on a swivel under the beam when the latter is lifted. A third type is made on the ” balance ” principle, two plough beams with mould-boards being placed at right angles to one another, so that while the right-hand plough is at work the left-hand is elevated above the ground. Double furrow or multiple ploughs are a combination of two or more ploughs arranged in echelon so as to plough two or more furrows. The weight of these implements necessitates some provision for turning them at the headlands, and this is supplied either by a bowl wheel, enabling the plough to be turned on one side, or by a pair of wheels cranked so that they can be raised by a lever when the plough is working. The double-furrow Turnwrest Plough. nately to its left and right, so that they all slope in the same direction. This is found advantageous on hill-sides where the work is easier if all the furrows are turned downhill; or from another point of view the furrows may be all laid uphill so as to ‘ Methods of the ” setting-out ” of land to be ploughed together with a full discussion of other technical details’ relating to ploughing will be found in ch. vii. of W. J. Malden’s Workman’s Technical Instructor (London, 1905). Riding Plough. plough was known as early as the 17th century, but, till the introduction of the latter device by Ransome in 1873, cannot be said-to have been in successful use. The ” sulky ” or riding plough is little known in the United Kingdom, but on the larger arable tracts of ” other countries where quick work is essential and the character of the surface permits, it is in general use. In this form of plough the frame is mounted on three wheels, one of which runs on the land, and the other two in the furrow. The furrow wheels are placed on inclined axles, the plough beam being carried on swing links, operated by a hand lever when it is necessary to raise the plough out of the furrow. The land wheel and the forward furrow wheel are adjustable vertically with reference to the frame, for the purpose of controlling the action of the plough. In the disk plough, which is built both as a riding and a walking plough, the essential feature is the substitution of a concavo- convex disk, pivoted on the plough beam, for the mould-board and share of the ordinary plough. This disk is carried on an axle inclined to the line of draught, and also to a vertical plane. As the machine is drawn forward the disk revolves and cuts deeply into the ground, and by reason of its inclination crowds the earth outwards and thus turns a furrow. A scraper is Multiple Disk Plough. provided to keep the disk clean and prevent sticking. The controlling levers and draught arrangements are similar to those in the ” sulky ” plough. The advantage of this plough over the ordinary form is in the absence of sliding friction, and in the mellow and porous condition in which it leaves the bottom of the furrow. Disk ploughs are unsuitable for heavy sticky soils and for stony land, but may be used with effect on stubbles and on land in a dry hard state. Perhaps their most common use is in ploughing on a large scale in conjunction with steam power. Steam is employed as motive power when it is necessary to plough large areas in a short time. In the United Kingdom steam ploughing is generally carried on on the double-engine system (introduced by Messrs John Fowler about 1865), in which case two sets of ploughs are arranged on the one-way balance principle, so that while one set is at work the other is carried clear of the ground. In this arrangement, a pair of locomotive engines, each having a plain winding drum fixed underneath the boiler, are placed opposite to each other at the ends of the field to be operated upon; the rope of each of the engines is attached to the plough, or other tillage implement, which is drawn to and fro betwixt them by each working in turn. While the engine in gear is coiling in its rope and drawing the plough towards itself, the rope of the other engine is paid out with merely so much drag on it as to keep it from kinking or getting ravelled on the drum. In the United States and elsewhere engines drawing behind them a number of ploughs, arranged in echelon and taking perhaps The sub-soil plough has the beam and body but not the mould-board of an ordinary plough. Following in the furrow of an ordinary plough it breaks through the sub-soil to a depth of several inches, making it porous and penetrable by plant roots. Gripping and draining ploughs are employed in opening the grips and trenches necessary both in surface and underground drainage. See Davidson and Chase,Farm Motors and Farm Machinery ; articles in L. H. Bailey’s Cyclopedia of American Agriculture (New York, 1907) and Standard Encyclopaedia (London, 1908).