Mapa, R.B.2014-12-162014-12-161996Journal of the Soil Science Society of Sri Lanka, 9:p.32-43https://dl.nsf.gov.lk/handle/1/16310Soil ScienceClay activitySoil mineralogyMineralogical compositionPlasticity indexRelationship between clay activity and specific surface with clay mineralogy for some major soils of Sri LankaArticle