Olive Mill Effluent Spreading Effects on Water Retention of Tunisian Sandy Loam Soil

Hamdi SAHRAOUI; Sabri KANZARI; Mohamed HACHICHA; Hafedh Jamil MELLOULI

Authors

Hamdi SAHRAOUI National Institute of Research of Rural Engineering, Waters and Forests of Tunis, Rue Hedi Karray, 2049 Ariana
Sabri KANZARI National Institute of Research of Rural Engineering, Waters and Forests of Tunis, Rue Hedi Karray, 2049 Ariana
Mohamed HACHICHA National Institute of Research of Rural Engineering, Waters and Forests of Tunis, Rue Hedi Karray, 2049 Ariana
Hafedh Jamil MELLOULI Institut National de la Recherche Agronomique de Tunisie, Rue Hedi Karray, 2049 Ariana

Keywords:

Olive mill effluents (OME), spreading, water retention

Abstract

Olive mill effluents (OME) are characterized by their nutrients content and their adhesive and hydrophobic properties. An experiment was carried out at an olive growing area in Tunisia, “Sidi Bou Ali”, to identify the impact of spreading over OME on physical soil characteristics. Three treatments were in situ monitored, namely T₀ (Control), T₁ (25 m³/ha) and T₂ (50 m³/ha), over a period of 4 months. Measurements were conducted monthly corresponding respectively to D₁, D₂, D₃ and D₄. Water retention curves were established by a physical capillary model in porous medium. Results showed that the two applied OME doses induced a decrease in water retention, especially for potential matrixes above pF 2 corresponding to the water available range. No significant differences were found between the treated soil plots T₁ and T₂.

doi:10.14456/WJST.2014.27

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