Amarasiri, S.L.Wijewardena, J.D.H.2016-05-062016-05-061989National Symposium on "The Eppawala Phosphate Deposit-Recent Advances in Knowledge":p.13https://dl-ifs.nsf.gov.lk/handle/1/1413Comparison of phosphate sources on growth of vegetables on an acidic soilConference Paper