ALPHA PLUS HARDI NOVA
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CHAPTER
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Find the range of air speeds that can control drift :
Start with the air setting at zero and keep increasing the air speed just to the point where you can see
that the drift cloud is minimised - note minimum setting.
Then increase the air speed until you see drift again - note maximum setting.
Now you know the range of air speeds that can be used with minimum drift.
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The range of air speeds is usually very small.
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The taller the crop the wider the range of air speeds that can reduce drift.
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More air is needed on the sprayer and it is advisable to drive more slowly and use minimum boom height
(40 cm)/(16 in).
NNOOTTEE
: Too high air speed over bare ground/low crop can cause reflection of the spray liquid and leave dust
on the leaves, which can again reduce the effect of the plant protection product.
AA
- Start with air vertical
- Set the air speed ...........
- Find the best angling .....
- Readjust the air .............
The air speed and angling must always be adjusted individually for each spray job and the given weather
conditions.
It is always a good idea to get used to a new sprayer out in a field using only water in the tank. On this occa-
sion the following routine for air adjustment should be practised :
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AA
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Fine turning of air speed and angling will often be necessary all through the spraying job.
It is easiest to find the best air setting to reduce drift when the sun is low and behind the bom (backlight)
These conditions make the drift more visible
AA
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