Types of Mould board

i) General purpose – It is a mould board having medium curvature lying between stubble and sod. It turns the well-defined furrow slice and pulverizes the soil thoroughly. It has a fairly long mould board with a gradual twist, the surface being slightly convex.

ii) Stubble type -It is short but broader mould board with a relatively abrupt curvature which lifts breaks and turns the furrow slice used in stubble soils. Its curvature is not gradual but it is abrupt along the top edge.

iii) Sod or Breaker type – It is a long mould board with gentle curvature which lifts and inverts the unbroken furrow slice. It is used in tough soil of grasses. It turns over thickly covered soil. This is very useful where complete inversion of soil is required by the farmer.

iv) Slat type – It is a mould board whose surface is made of slats placed along the length of the mould board, so that there are gaps between the slats. This type of mould board is often used, where the soil is sticky, because the solid mould board does not scour well in sticky soils.

c) Land side –

• It is the flat plate which bears against and transmits lateral thrust of the plough bottom to the furrow wall.
• It helps to resist the side pressure exerted by the furrow slice on the mouldboard.
• It also helps in stabilizing the plough while it is in operations.

d) Frog –

• Frog is that part of the plough bottom to which the other components of the plough bottom are attached.
• It is an irregular piece of metal. It may be made of cast iron for cast iron ploughs or it may be welded steel for steel ploughs.

E) Tail piece –

• It is an important extension of mouldboard which helps in turning a furrow slice.