Plough Accessories

There are a few accessories necessary for efficient function of the plough. They are

(i) Jointer
(ii) Coulter
(iii) Gauge wheel
(iv) Land wheel and
(v) Furrow wheel.

a) Jointer

It is a small irregular piece of metal having a shape similar to an ordinary plough
bottom.
It looks like a miniature plough.
Its purpose is to turn over a small ribbon like furrow slice directly in front of the main plough bottom.
This small furrow slice is cut from
the left and upper side of the main furrow slice and is inverted so that all trashes on the top of the soil are completely turned down and buried under the right hand corner of the
furrow.

b) Coulter

It is a device used to cut the furrow slice vertically from the land ahead of the
plough bottom.
It cuts the furrow slice from the land and leaves a clear wall.
It also cuts trashes which are covered under the soil by the plough.
The coulter may be
(a) Rolling type disc coulter or
(b) Sliding type knife coulter.
Rolling type disc coulter

It is a round steel disk which has been sharpened on the edge and suspended on
a shank and yoke from the beam.
The edge of the coulter may be either smooth or notched.
It is so fitted that it can be adjusted up-down and side ways.
The up-down adjustment takes care of depth and sideways adjustment is meant for taking care of
width of cut.

Sliding type knife coulter

It is a stationary knife fixed downward in a vertical position on the beam.
The knife does not roll over the ground but slides on the ground.
The knife may be of different shapes and sizes.

c) Gauge wheel

It is an auxiliary wheel of an implement to maintain an uniform depth of working.

Gauge wheel helps to maintain uniformity in respect of depth of ploughing in
different soil conditions.
It is usually placed in hanging position.
d) Land wheel - It is the wheel of the plough which runs on the ploughed land.
e) Front furrow wheel - It is the front wheel of the plough which runs in the furrow.
f) Rear furrow wheel - It is the rear wheel of the plough which runs in the furrow.

Adjustment of Mouldboard Plough

For proper penetration and efficient work by the mouldboard plough, some
adjustments are made from time to trime.
They are
(i) Vertical suction and
(ii) Horizontal suction.

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 also defined as the vertical distance from the ground, measured at the joining point of share and land
side. (Fig.7a). It helps the plough to penetrate into the soil to a proper depth. This
clearance varies according to the size of the plough.



b) Horizontal suction (Horizontal clearance)

It is the maximum clearance between the land side and the furrow wall.
This suction helps the plough to cut the proper width of furrow slice.
This clearance also varies according to the size of the plough. It is also known as side clearance.

c) Throat clearance

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

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