This document discusses types of disc ploughs. It begins by defining a disc plough as a plough that cuts, turns, and sometimes breaks furrow slices using separately mounted large steel discs to reduce friction. Disc ploughs work well in hard, dry soil and sticky soil where mouldboard ploughs do not perform satisfactorily. Advantages of disc ploughs include their ability to penetrate hard soil and work well in stony or stumpy soils with less risk of breakage. Disadvantages are that they do not cover surface trash as well as mouldboard ploughs and leave soil in a rougher condition. The document then discusses disc components like the disc itself, disc angle

1. SENTHUR POLYTECHNIC COLLEGE
DEPARTMENTCONSERVATION OF MECHANICAL ENGINEERING
4023520 / FARM MACHINERY
SEMINAR PRESENTATION
Submitted by
S E M I N A R T O P I C
T Y P E S O F D I S C P L O U G H
S U B M I T T E D B Y
K A V I Y A
( 2 2 2 1 9 9 7 3 )

2. DISC PLOUGH
• It is a plough which cuts, turns and in some cases breaks furrow slices by means of separately mounted
large steel discs.
• Adisc plough is designed with a view to reduce friction by making a rolling plough bottom.
• Adisc plough works well in the conditions where mould board plough does not work satisfactorily.

3. ADVANTAGES OF DISC PLOUGH
Adisc plough can be forced to penetrate into the soil which is too hard and dry.
 It works well in sticky soil in which a mould board plough does not scour. It is more useful
for deep ploughing.
 It can be used safely in stony and stumpy soil without much danger of breakage.
 Adisc plough works well even after a considerable part of a disc is worn off in abrasive soil.
It works in loose soil also (such as peat) without much clogging.

4. DISADVANTAGES OF DISC
PLOUGH
• It is not suitable for covering surface trash and weeds affectively as mould board plough does.
• Comparatively, the disc plough leaves the soil in rough and cloddy condition than that of mould
board plough.
• Disc plough is much heavier than mould board plough for equal capacities because penetration
of this plough is affected largely by its weight rather than suction.
• There is one significant difference between mould board plough and disc plough i.e., Mould
board plough forced into the ground by the suction of the plough, while the disc plough is forced
into the ground by its own weight.

5.  DISC:
• It is a circular, concave revolving steel plate used for cutting and inverting the soil. It is made of heat treated steel of 5 to 10
mm thickness. The edge of the disc is well sharpened to cut the soil.
 DISCANGLE:
• It is the angle at which the plane of the cutting edge of the disc is inclined to the direction of travel. Usually, the disc angle
of good plough varies between 42 - 450
 TILTANGLE:
• It is the angle at which the plane of the cutting edge of the disc is inclined to vertical plane. Usually, the tilt angle of good
plough varies between 15 - 250.

6. • The open blade type implement is commonly used for puddling in south india. It consists of series
of steel or cast iron blades fastened to a cast iron hub at an angle. The number of cast iron hubs
may be two or more. These hubs revolve on a steel shaft to which the wooden beam and the
operator’s seat are attached. Sometimes, these hubs form an integral part of the shaft which
revolves either in wooden or metallic bearings at the ends in the frame. This type of implement is
generally a walking type. The effective width of the puddler varies between 0.9 and 1.2 m.

7. • There are four classes of tractor drawn puddlers:
• (i) tine tiller,
• (ii) rotating blade puddler,
• (iii) disk harrow and
• (iv) power rotary tiller.
• Among these tractor drawn implements, disk harrow and power rotary tiller are in great use.
RVG