Wickramasinghe, Y.M.2012-12-062012-12-062006Agrieast5pp.01-10https://dl.nsf.gov.lk/handle/1/9516AgricultureAgricultural productionMarketing environmentProduction costsProfitability ratioTrend analysisAgricultural economicsFarmer response to changes in production environment in system H of MahaweliArticle