Mould board plow
Parts of
mould board plow
Share:
Ø It is the first part of the plough
to enter the soil and cut a furrow slice.
Mould
board:
Ø The cut soil is lifted upward to the
mould board where it is inverted by the curvature of this component.
Land
side:
Ø Assist in making a neat furrow. It
presses against furrow wall absorbing the side way thrust of the plough.
Frog:
Ø The component that joins the share,
mould board and land side.
Beam :
Ø Provides connection between the
plough and source of power.
The
shin:
This is the
cutting edge of mould board just above the land side and behind the share
Disc
plow:
Ø It has same functions as those of
M.B. plow but disc plow is preferred in stony, rocky and sticky soils (clay
soil) because the disk rolls over the stones. Due to rolling action of disks,
the soil that is stuck with disc is removed automatically.
Uses and
advantages:
Ø It is primary tillage implements
Ø It is used in stony and rocky areas
Ø In obstruction, this plow will ride
over
Ø In sticky soils (clay) the soil
would be removed and cleaned by rolling action of disk.
Ø It penetrate deeper than mould board
plow
Ø Its maintenance cost is less since
there are no shares or shin
Ø As it rolls over the stones, so it
has longer life than mould board plow.
Disadvantages:
Ø It does not turn soil so effectively
as mould board plow
Ø It does not incorporate vegetation
and trash effectively
Ø It is heavier
Ø It is more costly
Ø Since it goes to deeper depth, it
requires more horsepower.
Ø It does not pulverize the soil so effectively
Ø It leaves the soil cloddy and
rougher
Disc
plow:
Ø It has same functions as those of
M.B. plow but disc plow is preferred in stony, rocky and sticky soils (clay
soil) because the disk rolls over the stones. Due to rolling action of disks,
the soil that is stuck with disc is removed automatically.
Uses and
advantages:
Ø It is primary tillage implements
Ø It is used in stony and rocky areas
Ø In obstruction, this plow will ride
over
Ø In sticky soils (clay) the soil
would be removed and cleaned by rolling action of disk.
Ø It penetrate deeper than mould board
plow
Ø Its maintenance cost is less since
there are no shares or shin
Ø As it rolls over the stones, so it
has longer life than mould board plow.
Disadvantages:
Ø It does not turn soil so effectively
as mould board plow
Ø It does not incorporate vegetation
and trash effectively
Ø It is heavier
Ø It is more costly
Ø Since it goes to deeper depth, it
requires more horsepower.
Ø It does not pulverize the soil so effectively
Ø It leaves the soil cloddy and
rougher
Design
and construction
Ø It consist of round, concave, heat
treated disks with sharp edges in order to cut the soil.
Ø Diameter of disks varies from 20-40
inches (50-100 cm).
Ø Size of plow is specified by
diameter of disk.
Ø Thickness of disk varies from 0.5 cm
to 1.0 cm.
Ø The disk are placed 22.5- 30 cm a
part
Disk angle:
Ø The disk blades are set at an angle
from the forward line of travel called the disk angle it varies from 42 to 45
degree. It controls the width of the furrow as well as degree of pulverization.
Tilt
angle:
Ø The angle of disk from the vertical
line is called the tilt angle. It varies from 15 to 25 degree. It controls the
depth of penetration.
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