Adjustment of mould board plough

A) Vertical suction (Vertical clearance)

• It is the maximum clearance under the land side and the horizontal surface when the plough is resting on a horizontal surface in the working position.
• It is the vertical distance from the ground, measured at the joining point of share and land side.
• It helps the plough to penetrate into the soil to a proper depth.

B) Horizontal suction (Horizontal clearance)

• It is the maximum clearance between the land side and a horizontal plant touching point of share at its gunnel side and heal of land side .
• This suction helps the plough to cut the proper width of furrow slice.
• This clearance varies according to the size of the plough. It is also known as side clearance.

C) Throat clearance

• It is the perpendicular distance between point of share and lower position of the beam of the plough.

D) Plough size

• The size of the mould board plough is expressed by width of cut of the soil.