Liquid Fertilizer; Additional Information - Hardi COMMANDER DELTA FORCE Instruction Book

Liquid Fertilizer

Spraying pressure
If you are spraying with liquid fertiliser instead of pesticides, the spraying pressure must be increased in comparison to
pesticide spraying to get the desired output (l/ha).
The density for liquid fertiliser is normally higher than for water and spray liquids - so to get the correct output (l/ha), the
spraying pressure must be adjusted.
Example:
Nozzle output is 2.40 l/min at 3.0 bar pressure. Density of liquid fertiliser is 1.20 g/cm³.
Multiply the pressure value with the density value: 3.0 x 1.20 = 3.6.
The adjusted pressure is now 3.6 bar for spraying the liquid fertiliser.
In the table below, adjusted pressure values can be found for different densities of liquid fertilisers.
Calibrated pressure (bar) when spraying with
pesticides
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
μ
ATTENTION! Pressure values below 1.5 bar or above 5.0 bar are considered to be out of range for the nozzles.
÷
NOTE! Find the density for your liquid fertilizer on the packaging or on the material safety data sheet (MSDS) included.

Additional Information

See the other book delivered from HARDI - Spray Technique - to get further information about:
• Calibration of the sprayer
• Nozzle Choice
• Nozzle Wear
• Spray Distribution
• Spray Pressure
• Water Volume Rates
• Weather Influence on Spraying
• Useful Formulae
For optional equipment - see other books delivered or contact HARDI.
Density (g/cm³) for liquid fertiliser
1.10 1.15
Adjusted pressure (bar) when spraying with liquid fertiliser
1.7 1.7
2.2 2.3
2.8 2.9
3.3 3.5
3.9 4.0
4.4 4.6
5.0 5.2
5.5 5.8
5 - Operation
1.20 1.30
1.8 2.0
2.4 2.6
3.0 3.3
3.6 3.9
4.2 4.6
4.8 5.2
5.4 5.9
6.0 6.5
1.40
2.1
2.8
3.5
4.2
4.9
5.6
6.3
7.0
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