horsch LEEB PT 330, Operating Instructions Manual

Page: 192 / 203

16.6 Operation with liquid
fertiliser
At present there are mainly two different types
of liquid fertiliser available:
¾
Ammonium nitrate - carbonyl diamide solution
( AHL) with 28 kg N per 100 kg AHL.
¾
A NP-solution 10-34-0 with 10 kg N and 34 kg
P
2
O
5
per 100 kg NP-solution.
When using flat jet nozzles you must multiply
the corresponding values for the application
quantity (l/ha) from the spraying table with
0.88 for AHL and 0.85 for NP-solution. The
listed application quantities (l/ha) only apply
for water.
The following is generally valid:
Place liquid fertiliser in the form of coarse drops,
to prevent burning of plants. Too large drops
will roll off the leaf and small drops enhance the
magnifying glass effect.
Due to the salt concentration in the fertiliser,
excessive application of fertiliser can cause
burning on the leaves.
3-jet nozzles (option)
The use of 3-jet nozzles for the application of
liquid fertiliser is beneficial if the liquid fertiliser
is to enter into the plant through the roots rather
than through the leaf.
The nozzle orifice integrated in the nozzle with
its opening ensures an almost pressureless,
coarse drop distribution of the liquid fertiliser.
This prevents the generation of undesired spray
mist and the formation of small droplets. The
coarse drops created by the 3-jet nozzle hit the
plants with low energy and roll off their surface.
Even though damage caused by burning is
almost completely prevented, one should not
use 3-jet spray nozzles for late top dressing,
but use trailed hoses instead.
Only use the black bayonet nuts for all the fol-
lowing 3-jet nozzles.
Various 3-jet nozzles and their fields of
application (at 8 km/h)
3 - jet - yellow 50 - 80 l/ha (AHL)
3 - jet - red 80 - 126 l/ha (AHL)
3 - jet - blue 115 - 180 l/ha (AHL)
3 - jet - white 155 - 267 l/ha (AHL)
NOTE
The spraying pump must be flushed with clean
water after each liquid fertiliser operation. If not
flushed with clear water, the pump seals may
be damaged!
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