Monitoring of soil salinity in the irrigated area of Kalaât El Andalous (Tunisia)
Soil salinity is the most common problem limiting crop production in irrigated agriculture in arid and semi-arid area. In Tunisia, Kalâat El Andalous irrigated district is one of the most affected area by salinization due to shallow groundwater level. The objective of this study was to monitor soil salinity under different cropping pattern and during a long period (two years). Results show that average root zone (0-60 cm) electrical conductivity was 2.3 dS m-1, 2.8 dS m-1 and 3 dS m-1 in May 2008, May 2009 and May 2010 respectively. But it isn’t the case when we analyze an irrigation season where highest electrical conductivity value equal to 8.4 dS m-1 was recorded in the upper layer (0-30 cm). Following the rains fall particularly during the winter season there has been a decrease of the soil salinity when the average minimum value of electrical conductivity reached 2 dS m-1.
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