During the last decade, the Ouargla basin went through a problem of groundwater rise that had prejudicial consequences on the oasis environment. We studied the impact of hydroedaphic environment on root systems of the Deglet Noor date palm in the date-producing areas of Ouargla basin. The results indicated that 53.9% of date-producing farms showed a water table depth between 29 and 119.4 cm. Root distribution of date palms 80 cm far from the trunk showed that 56.9% of the palm plantations exhibit a rooting depth between 27 and 119 cm, including 3% of which is caused by the gypseous and gypseous-calcareous crusts alone, 10.8% of which is caused by the water table combined with the gypseous and gypseous-calcareous crusts and finally 43.1% of which caused by the water table. Electric conductivity of groundwater varied from 10 to 39.7 dS. m-1. The correlation analysis confirmed that lower water table depths and, gypseous and gypseous-calcareous crusts caused a decrease in the root system depth. Roots avoided both water saturation zone and mechanical resistance in the crusts, causing them to develop in the side direction. Salinity of groundwater proved to be less important to rooting of the date palm compared to level of the ground water.
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