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Fertilizer are injected into irrigation systems using different types of fertigation techniques starting from the standard fertilizer tank, to different types of venturi injectors, dosing pumps and complete fertilization station for more complex solutions. The fertilization units are installed before the filtration station to ensure that any precipitates are filtered out before entering the irrigation system. The type of fertigation unit is decided depending on the irrigation system in use, fertilizer application, and the crop intensity.

1 Fertilizer Tanks

Fertilizer tanks are used for all types of drip, sprinkler and micro irrigation systems. Used to feed soluble and liquid fertilizers through mixing the fertilizer with the irrigation water via a pressure differential or a booster pump, upstream of the screen or disk filter.

2 Venturi Injectors

Venturi Injectors are high-efficiency, differential pressure injectors with internal mixing vanes. When a sufficient pressure difference exists between the inlet and outlet sides of the injector, a vacuum is created inside the injector body, which initiates suction of a liquid or gas through the suction port. No electrical connections are needed and can run dry with no problems. The venturi injector is an economical solution for fertilization systems. They are available in Polypropylene, natural PVDF or ECTFE.

3 Water Hydraulic Pumps

Hydraulic pumps are installed directly in the water supply line. They operate by using the flow of water as the power source. The water activates the pump, which takes up the required percentage of concentrate directly from the fertilizer container and injects it into the water. Inside the hydraulic pump, the concentrate is mixed with the water and the water pressure forces the solution downstream. The dose of concentrate will be directly proportional to the volume of water entering the pump, regardless of variations in flow or pressure, which may occur in the main line.

4 Fertilization Stations

Fertilization stations are equipment that work on mixing more than one solution of fertilizers into the irrigation system in accordance to a predetermined dosing percentage. Fertilizers, acids and other nutrients are mixed and dosed into the system by the fertilization station. Many such models are available depending on the type of nutrient solution required and enjoy a variety of optional features to improve the fertilization process and control.

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