Agriculture Reference
In-Depth Information
Photo 11.2.
The control centre of a localized irrigation system.
1. Electric valve
2. Hydrocyclone
3. Manometer
4. Sand filter
5. Gate valve
6. Fertigation equipment
7. Disc or mesh filter
8. Controller (computer)
9. Flow meter
Mechanisms for automatic
operation in the field (solenoid
valves, volumetric valves)
8
6
1
5
9
7
2
4
3
3
3
3
Fig. 11.2.
Scheme of a control centre of a localized irrigation system.
high solid content, mainly sand, it is com-
mon to use a separating hydrocyclone to
pre-filter the water.
The fertilization equipment is an essen-
tial component for fertigation; fertilizer
tanks, venturi injectors and metering pumps
being its most common components. In
more sophisticated irrigation control cen-
tres, pH and electric conductivity probes
usually complete the system.
The main and secondary pipelines,
made of plastic materials (PVC or PE), carry
the water towards the irrigation pipes (of
PE), to which the emitters or diffusers are
connected, through which the water is sup-
plied to the soil or substrate.
Pressure meters are required to monitor
the performance of the system. These are
placed, at least, after the pump and after the
filters. Flow meters are compulsory in some
