Prediction of Consistency Limits by using some of Soil Physio-chemical properties for chosen soils in Basrah province

Abstract

This study was conducted to predict the soil consistency limits ( shrinkage , plasticity, liquid limits and plasticity index ) by using the relationship between these limits as functions for some soil properties such as clay fraction ,organic matter , calcium carbonate ,sodium adsorption ratio and electrical conductivity . Eight soil samples type were taken from Al-faw,Al-Seiba, Abu -Alkhasib , Al- Bradaea, Al-Tanuma , Al-Hartha , Al-Deer and Al-Kurna districts . Results showed that shrinkage limit values were between 2.0 and 8.5 % for Al-Deer and Al-Kurna soils, respectively .where as the averages of plasticity limits were between 22.03 and 25.88 %for Al- Deer and Abu- Alkhasib . The liquid limit values were between 38.0 and 49.00 % and the plasticity index were between 12.43 and 23.12 %for Al- Seiba and Abu- Alkasib soils, respectively Results olso showed that the clay fraction was between 95.24 and 511.73 g kg -1 for Al- Kurna and Abu -Al Khaseb, respectively . The organic matter amount is 2.68 and 38.85 g kg -1 for the soils of Al-Tanuma and Al-Bradaea respectively . Calcium carbonate amount was 206.20- 427.80 g kg -1for Al – Bradaea and Al Seiba, respectively . Al- deer soil had the lowest values of sodium adsorption ratio and electrical conductivity which was 3.08 and 5.12 ds m-1 while the highet values were 9.26 and 120.00 ds m-1 for Al-Hartha soil, respectively .