Gunasena, H.P.M.2012-04-102012-04-102003Tropical Agricultural Research and Extension6pp.22-28https://dl.nsf.gov.lk/handle/1/8167AgricultureAgricultural productionTechnologyOrganic farmingAgricultural researchHuman resource developmentAgricultural extensionLand useNational agricultural policyNatural resourcesStrategies for increasing agricultural productivity in the 21st centuryArticle