MAHDI, H., DJILI, K., DAOUD, Y. (2023). Reversibility of Saturated Hydraulic Conductivity under Soil Sodicity and High Electrolyte Concentration. , 13(2), 127-135. doi: 10.33794/qjas.2023.144396.1146
Hassina MAHDI; kaddour DJILI; Youcef DAOUD. "Reversibility of Saturated Hydraulic Conductivity under Soil Sodicity and High Electrolyte Concentration". , 13, 2, 2023, 127-135. doi: 10.33794/qjas.2023.144396.1146
MAHDI, H., DJILI, K., DAOUD, Y. (2023). 'Reversibility of Saturated Hydraulic Conductivity under Soil Sodicity and High Electrolyte Concentration', , 13(2), pp. 127-135. doi: 10.33794/qjas.2023.144396.1146
MAHDI, H., DJILI, K., DAOUD, Y. Reversibility of Saturated Hydraulic Conductivity under Soil Sodicity and High Electrolyte Concentration. , 2023; 13(2): 127-135. doi: 10.33794/qjas.2023.144396.1146

Reversibility of Saturated Hydraulic Conductivity under Soil Sodicity and High Electrolyte Concentration

Al-Qadisiyah Journal For Agriculture Sciences
Article 14, Volume 13, Issue 2, December 2023, Pages 127-135    PDF (756.16 K)
Document Type: Research Paper
DOI: 10.33794/qjas.2023.144396.1146
Authors
Hassina MAHDI* 1; kaddour DJILI2; Youcef DAOUD1
1Department of Soil Science, National Higher School of Agronomy, El Harrach, Algeria
2Department of Soil Science, National Higher School of agronomy , El Harrach, Algiers, Algeria
Abstract
We investigated the effect of sodicity on the reversibility of saturated hydraulic conductivity (Ks) under high electrolyte concentration (HEC) EC ≥16 dS/m. This laboratory investigation consisted of measurment of Ks using the permeameter of McNeal and Reeve (1964) by varying sodicity. We increased sodicity, expressed by Sodium Adsorption Ratio (SAR), in steps from a min of 0 to a max of 30, and then we followed the same procedure, but then backwards. Measurement of soil dispersion was carried out for all the SAR values used in the measurement of Ks using the method of Velasco-Molina et al. (1971). Under HEC Ks decreased as sodium adsorption ratio (SAR) increased. SAR increment of +/- 15 causes the most important decrease. However, when decreasing the SAR again, Ks does not show an increase, it is irreversible for these conditions of experimentation.In contrast; soil dispersion (SD) shows an increase with increasing SAR, but then also decreases again when SAR is lowered. This decrease is not sufficient to compensate the irreversibility of Ks.
Keywords
Saturated hydraulic conductivity; reversibility; SAR; dispersion; Electrical Conductivity
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