[ Vegetables | Tunisia ]
GEOPRODUCTION IS A FARM OF 20 CANARIAN GREENHOUSES OF 1HA EACH (TOTAL 20HA), 2 RESERVOIRS (5000M3 TO 2000M3) AND A FERTIGATION STATION
IT WAS CREATED IN 2006 AND IS LOCATED IN EL HAMMA, GABES GOVERNORATE IN SOUTHERN TUNISIA. ITS MAIN ACTIVITY IS THE PRODUCTION OF HIGH QUALITY TOMATOES IN GREENHOUSES HEATED BY GEOTHERMAL WATER
In 2007 the producer had to deal with two major problems: the salinity of the irrigation water and the presence of nematodes.
- The water used for irrigation is a geothermal source of water having a conductivity EC of 4.4 mS/cm(3.2 g/l)
- Presence of nematodes found in the early crops in 2007
These conditions are extremely difficult for irrigation and good crop development. Reverse osmosis to desalinate water was not a viable option for the project. They had to find an alternative solution.
To solve these two major problems, they installed:
In 2008 a first Aqua-4D® 1440 system, 80m3/hr on a first plot of 10ha
In 2009 a second Aqua-4D® 1440 system, 80m3/hr when putting into operation of a second plot of 10 ha
- The yields are similar to those that would have occurred if the crops were irrigated with fresh water
The fruits are of good quality (firm, red and with good flavour)
The size meets the requirements of the export markets
There are very few apical necrosis cases despite the heat and salinity. The Aqua-4D® enables a good absorption of calcium present in high levels in irrigation water
There is no accumulation of salts in the soil’s rhizosphere