Gunawardhana, H.D.Kumudini, A.M.Adikari, R.2010-07-062010-07-061981Journal of the National Science Council of Sri Lanka, 9(2):p.121-148https://dl.nsf.gov.lk/handle/1/6702Water qualityResiduesIrrigationAlkalinityChemical analysisMahaweli development projectAgricultureChemistryStudies on the quality of irrigation waters in Kalawewa areaArticle