Home' Grower : May 2012 Contents The South Australian Grower -- May 2012
Four fans boost
By ASHLEY WALMSLEY
UPON first glance, it looks
like a new ride at the show.
But further inspection
reveals this to be an orchard
sprayer unlike anything else on the
Tony Denton of Adds Up
Engineering, Bundaberg, in
Queensland, is set to release his
patented Oscillating Fan Sprayer.
The core concept is all about
making the already available air
work, as opposed to having a large
fixed fan or multiple small fans at
The unit has four, 1200-millime-
tre long barrel fans tilt and rotate
to generate an oscillating fan cur-
The fans are equipped with five
jets, which feed the chemical into
the airstream created.
The chemical-induced air moves
as natural airflow which exists
within the tree already, delivering
product where needed.
Once the flow is created, the
chemical is essentially just along
for the ride.
"We're actually opening up the
tree with the oscillating air and
replacing it inside the tree with air
laden with chemical," Mr Denton
Like many of his ideas, the oscil-
lating fan sprayer has been rattling
Fans equipped with five
Airflow opens up the
Unrivalled penetration and
Practical support tool
for best management
STEP up Soil Condition is a practical
support tool to encourage step-wise
adoption of management options
targeting soil organic matter, acidity
The program is designed as a
starting point for growers to build
their knowledge and improve
discussions with service providers
supporting their industries, and select
appropriate management options.
Participants decide their knowledge
requirements and the level of
Interested growers in the Northern
Adelaide Plains, Adelaide Hills,
Barossa Valley and Murray Bridge
regions will be able to attend
workshops and participate in
financially supported grower groups.
There are three colour coded
modules. Each module consists of a
small number of information sheets,
and an associated risk assessment
worksheet. Users will be able to
target management strategies and
integrate them into their existing
programs, or alternatively develop
simple action/evaluation plans of
Green: Acidity -- a module which
provides a better understanding of
acidifying factors in the carbon and
nitrogen cycles and how they are
promoted by agriculture, as well as
uses of different products and
practices to manage the risk.
Figure 1: Manganese toxicity in
Blue: Carbon -- a module which
provides a better understanding of
key soil functions supplied by organic
matter, turnover of different types of
organic materials, and uses of
different organic products and
management practices to maintain
Figure 2: Biochar. Source: University
of Western Australia
Orange: Erosion -- a module which
focuses on the causes and
management of wind and water
Figure 3: Water Erosion. Source: Mary
If you wish to aim for the extra 1
per cent or 2pc increase in yield, trial
new ideas, participate in grower
networks or access the program
online in the future, register your
interest in the Step up Soil Condition
program by contacting:
Jeanette Chapman 0427 852 628 or
around in his head for a while.
"We always wanted to design the
ultimate orchard sprayer," Mr
He provided Fairfax Agricultural
Media with an exclusive in-field
demonstration of the sprayer in
action within a macadamia
The airflow opens up the foliage,
allowing the spray to go within,
something particularly noticeable
on the dense macadamia foliage.
Upon closer inspection follow-
ing a pass, the very inner leaves of
the tree held droplets in what
seemed a rate as even as the other
Not shy in touting its ability to
be better than any air-assist
sprayer, the promotional poster
claims "unrivalled penetration and
coverage" using high or low vol-
"It's all about doing a better job
and reducing the chemical rate,"
Mr Denton said.
The speed of the oscillation is
electrically adjustable from inside
the tractor cabin, using a digital
The unit also features rear-facing
cameras, which provide a visual
monitoring reference for the driv-
er via the screen within the cabin.
Spray speeds of about 4 kilome-
tres an hour to 5km/h can be
achieved with oscillations of only
30 revolutions a minute.
The high-pressure pump used is
capable of 50-bar capacity.
So r unning the system at 40-bar
or less, in combination with the
oscillating air, works well.
The oscillating air comes directly
Four 1200mm long barrel fans
tilt and rotate to generate an
oscillating fan current. The
tailgate can also raise to 6m.
Five jets feed chemical into
the oscillating air stream,
delivering onto the foliage.
from the fans and does not require
any duct work or moving flaps.
This ensures the air speed and
pressure maintain their integrity.
Tank sizes can be customised to
user requirements, anywhere
between 1000 litres to 6000L.
Smaller three-point linkage units
are also available.
Despite the obvious visible
movement of the fans, Mr Denton
claims there are actually less mov-
ing parts compared to standard
citr us oscillating spray units.
The masthead holding the fans
can be raised and lowered accord-
ing to tree heights.
While it is capable of spraying up
to 6-metre high trees, the air
movement means minimal waste.
"We're not really spraying any
chemical high into the air," Mr
"We are using it to work into the
trees with every oscillation."
Citrus growers in the Gayndah
area have already expressed inter-
est in the new sprayer.
Mr Denton said he hoped to
conduct an on-farm demonstra-
tion in the area soon.
• Watch video of the oscillating fan
sprayer in action at
Courtesy Good Fruit & Vegetables
Forging a New Direction
in Weed Management
Registered trademark of BASF Copyright 2007
For the control of
and grass weeds in
green beans, navy
beans, sweet corn,
corn, poppies, green
Contact your local distributor or Serve-Ag Pty Ltd.
Ph: (03) 6498 6800 Fax: (03) 6427 0801
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