Relationship of atterberg limits with soil water constants in aridisolsoils of Punjab [Pakistan]
2003
Hannan, A.,Directorate of Land Reclamation, Faisalabad (Pakistan).Irrigation and Power Dept.
Three different calcareous soil series in Punjab viz., Rasulpur, Bhalwaland Miranpur were selected to estimate Atterberg limits and waterretention at different suctions. The liquid limit (LL) was determined byusing liquid Limit device and plastic limit (PL) by rolling moist soilbetween fingers and glass plate to a thread of 3.2 mm diameters and thendetermining its water content. The water content of the soil series was alsojudged by placing the saturated soil samples inside extractor connected tothe hydraulic outflow subjected to subsequent tensions at -33 and -1500kPa tensions. The LL and PL were found maximum in case of Miranpur soilseries (33.40 percent and 18.59 percent, respectively), whereas Rasulpursoil series was observed to be non-liquid and non plastic. Highest SL wasobserved (21.01 percent) in Miranpur as compared to the rest of the soilseries. Maximum available water capacity (13.3 percent) was found inMiranpur soil series. Highly significant correlation coefficient between PLand field capacity was observed in Bhalwal soil series (r = 0.98*). Thecorrelation coefficient between SL and Permanent wilting point was alsosignificant in both Bhalwal (r=0.88*) and Miranpur (r = 0.89*) soil series. Itwas concluded that clay content influenced significantly Atterberg limitsand soil-water retention at different suctions.
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