Comparative Study on Salinity Measurements in Soils of the North Western Coastal Region of Egypt

Document Type : Original Article

Authors

1 University of Alexandria, Faculty of Agriculture, Soil & Agriculture Chemistry Deptment,

2 University of Omar Al-Mokhtar, Faculty of Agriculture El-Beida Libya

Abstract

Saturated soil paste and 1:1, 1:2, 1:3, 1:4, 1:5 soils to water extracts are used for assessing soil salinity of 36 soil samples collected from the Egyptian north western coastal plain. These soil to water extracts were prepared from the tested soil samples and analyzed for EC, major cations (Na+, K+, Mg++, Ca++) and major anions (Cl-, SO4=, HCO3-). Relationships of all analytes for the tested methods were established using linear and power regressions. The results showed that, analytes from 1: 1 soil to water extracts and saturated paste extracts were highly correlated. The relationship between the EC values in the saturation extract (Y) and the EC of 1:1 soil water extract (X) could be expressed as: Y= 0.11+2.41 X. The statistical relation betweenions and its SAR for saturation extract values and other soil water extracts were also calculated and expressed in regression equations. Findings from this study showed that method is considerable an accurate and valid for measuring the salinity of soil as well as the saturated soil extract method. Prediction of the salinity of soil saturation extract can be calculated from data of 1:1 soil-water extract by using regression equations obtained in the study especially for soils of the studied area..

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