Mapa, R.B.Wickramasinghe, S.2014-12-162014-12-162002Journal of the Soil Science Society of Sri Lanka, 14:p.35-41https://dl.nsf.gov.lk/handle/1/16267Soil ScienceSampling schemeAlfisolsSoil propertiesSoil pHElectrical conductivitySand percentageClay percentageSoil contentsUse of variability in determining the minimum sample size to estimate selected soil properties of Alfisols in Sri LankaArticle