A Plough is ground leveling implement and is used to break the clod, process the soil to destroy the weeds finally. There are different types of Ploughs and let us start with Disc Plough.
The dished smooth disk with square holes in the center are generally used. These Discs have self sharpening features but the edges may sometimes become blunt due to rough usage on stoney field locations. The blunt edges give poor penetration and cutting. In such situation, it is necessary to ground the edges with portable electric grinder.
Most Disc Harrows have perfect round disc shape. in some cases, there is heavy residue left on the field and heavy trash cutting is required. The notched discs are an answer to such a requirement. These Disks are available in the range of 16"-24" diameter. Most of the modern ploughs use diameter range of 1"-24".
The trailing type Harrows are pulled by Tractors and they do not have transport wheel. They sometimes have transport wheel which is worked upon mechanically or hydraulically when the Harrow needs to be transferred from the fields to the farmers place.
Single Action Disc Harrows cuts the soil in only one direction. The cutting width is generally between 4' to 20'.
Double Action Disc Harrows are also named Tandem Disc Harrows. Here, Disks are arranged in such a way that disc of front gang throws the soil in one direction and discs of rear gang throws the soil in opposite direction. This type of harrow facilitates homogeneous mixing of soil. They are best choice for such requirements.
This type of harrows can be worked upon in an offset position i.e. why it is called offset harrow. A single change in hitch makes the harrow to move either to the left or right side of the tractor. This is very popular nowadays as it gives a very smooth soil.
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