Home' On The Land : March 10th 2011 Contents 12 -- ON THE LAND THURSDAY, March 10, 2011
On The Land
Rober t Collins and Jason Torney with one of the new seed drilling machines.
A T&G Drains mole plough in operation.
THE popular Aitchison Seedmatic Drill
series has been extended this season with
the addition of the updated Aitchison
A big brother to the highly respected
and well-known Aitchison Seedmatic, this
new addition has already sold out of its
first production run as dealers scramble to
stock up for the approaching season.
Once again, Aitchison has set a new
benchmark with build quality and atten-
tion to detail and a list of innovations that
further cement its place at the top.
This truly versatile drill has been de-
signed as a result of considerable feedback
from the farming community and offers as
standard, specifications usually found as
an option on its competitors' machines.
The patented Aitchison sponge feed
seeding system, with its ability to sow all
seeds, remains unchanged. With a seeding
range from 1kg up to 350kg per hectare, it
covers the whole range.
The stainless steel fertiliser box is also
able to sow seed down as low as 8kg per
hectare, and that in some cases saves the
need for a third box.
It is designed for the serious farmer and
contractor with class-leading features that
r 25mm three-coil tines for superior
trash shedding and increased tilth;
r Row spacing of 136mm;
r Wide 550mm stagger;
r Large 14-inch disc coulters;
r16-inch transport wheels for road
stability and clearance;
r Wide 255mm ground wheels for
decreased ground pressure;
r Optional drawbar ram kit to increase
coulter ground clearance in extreme condi-
tions --- on trailed units it fits in place of
r Seed bin level indicator as standard
r Stainless steel fertiliser bin as
r Road lighting as standard;
r Unique roller fertiliser delivery also
able to sow seed as low as 8kg per hectare;
r New safety rail with loading gate on
tread board; and
r Optional self-loading chain harrow or
all new tyre roller and self-levelling hitch.
DRAINAGE problems occur where water
tables are high.
High water tables can happen where there
is little or no available outfall for surface
drainage water or where slopes flatten out
and water seepage occurs where soil type
changes from adequately drained soils on the
higher terrain to more poorly drained soils
on the flatter terrain.
Elevated watertables result in waterlog-
ging with detrimental effects on agricultural
production. Waterlogged soils are prone to
structural damage if worked when wet or if
compacted by livestock (pugging) or vehicles.
Waterlogging can cause increased soil
erosion problems because the saturated soil
cannot absorb more water.
In trial work at DemoDAIRY, DPI
researcher Greame Ward found that heavy
pugging of wet soils reduced pasture produc-
tion by more than 50 per cent. In addition,
clover was virtually eliminated from the
pasture and the soil structure severely
To reduce pugging, a drainage system con-
sisting of subsurface drains in combination
with mole drains can be installed to prevent
paddocks from becoming waterlogged.
Subsurface drainage removes excess water
through a network of perforated corrugated
polydrain installed two to four feet below the
When the water table is higher than the
polydrains, water flows into the holes of the
corrugated polydrain, lowering the water
level over several days.
Mole drains are used in heavy soils, with
low rates of soil-water movement. This
requires a closely spaced subsoil drainage
system to provide sufficient water movement
to prevent waterlogging.
The close spacing makes polydrain an
impractical and costly option.
Mole drains are unlined channels formed
in the clay subsoil. They are formed by
pulling a ripper with a cylindrical foot on the
bottom and an expander through the subsoil.
The cracks in the soil form little water-
ways to the channel in the ground. This
provides the major flow paths for the soil
water to move into the mole drain. Excess
water then flows through the soil cracks to
and along the mole drain, then drains into
the permeable backfill above the polydrains,
and is quickly removed.
Mole channels must have an even, gentle
grade, with minimal grade changes. T&G
Drains use a floating beam mole plough to
install the mole drains. A floating beam mole
plough allows the expander to maintain
itself at the set depth irrespective of small
ground surface irregularities and allows
the ripperleg and the expander to produce a
smooth gradient to the mole channels.
In undulating country the sub-surface
drains are often in the leads of the lower
areas of the land. The mole drains are put
in across the sub-surface drains cutting
through the gravel. Water will drain down
the mole drains and into the sub-surface
drains. Alternatively mole drains can be
used in conjunction with open drains.
Graeme McFadden 0409 011 938
Robert Collins 0418 131 504
AH Service: 0418 131 984
94 Caramut Road, Warrnambool
Phone 5562 1744
Call the boys today, to enquire about seed drills.
Aitchison drills are
world leaders in seeding
technology for improved
• Unique knock-on/off
replacable Baker boot
• Tungsten tipped Ni-hard
Baker boots require no
• One lever control for
seeding rate adjustment
• Sowing rates from as
low as 500gms and up to
350kg per hectare
• Aitchison sponge feed
seeding mechanism Gentle on seed and tough on accuracy, whether seeds are large or
Aitchison Seed Matic tine
or disc drills
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