Mapa, R.B.2012-04-102012-04-102003Tropical Agricultural Research and Extension6pp.44-48https://dl.nsf.gov.lk/handle/1/8169Soil ScienceSoil degradationSoil erosionSoil fertilitySalinizationSoil managementLanduse planningSoil databaseSustainable soil management in the 21st centuryArticle