This document discusses different types of secondary tillage implements used in farming. It describes harrows, disc harrows, spike tooth harrows, spring tooth harrows, Acme harrows, Patela harrows, triangular harrows, blade harrows, Guntaka harrows, and reciprocating power harrows. For each type, it provides brief details about their purpose and functioning, such as pulverizing soil, crushing clods and weeds, and leveling planted fields.

1. SENTHUR POLYTECHNIC COLLEGE
DEPARTMENT OF AGRICULTURAL TECHNOLOGY
4023520 / FARM MACHINERY
SEMINAR PRESENTATION
S E M I N A R T O P I C
T Y P E S O F P L O U G H S
S U B M I T T E D B Y
L A T H I K A
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2. Introduction
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Secondary tillage consists of conditioning
the soil
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objectives
to meet the different tillage
of the farm. These operations
consume less power per unit area compared
to primary tillage operations.

3. Types of Secondary Tillage Implements
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• Harrow
• Disc harrow
• Spike tooth harrow
• Spring tooth harrow
• Acme harrow
• Patela
• Triangular harrow
• Blade harrow (Bakhar)
• Guntaka
• Reciprocating power harrow.
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4. Harro
w
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• Harrow is a secondary tillage implement.
• That cuts the soil to a shallow depth for smoothening
and pulverizing.
• the soil as well as to cut the weeds and to mix the
materials with the soil.
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5. Acme
harrow
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• It is also called as knife harrow.
• The front part of the knife breaks the soil and
crushes the clods .
• This harrow obtains a good pulverization.

6. Patela Harrow
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• It is a wooden plank used for smoothening the soil
and crushing the weeds.
• It is also used for breaking clods, packing and
leveling the ploughed soil and to remove the weeds.
• The cutting edge levels and packs the soil and the
curved hooks uproot and collect the weeds.

7. Triangular harrow
• It is a spike tooth harrow with triangular
frame.
• The frame is made of wood and pointed
spikes are fitted in the frame.
• The teeth of the spikes are fixed
and not adjustable.
• This type pulverizes the soil and helps in
killing weeds.
• The levers are provided for setting the teeth
for varying the depth of harrowing.
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8. Blade harrow
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• It is used to prepare seedbeds mostly in clayey
soils.
• It works like a sweep, which moves into top
surface of the soil without inverting the soil.