Amaraweera, T.H.N.G.Pitawala, H.M.T.G.A.Fernando, G.W.A.R.2015-04-202015-04-202007Proceedings of the 2nd Earth Resources Engineering Conference (ERE 2007), Colombo, November 2, 2007:p.25-28https://dl.nsf.gov.lk/handle/1/19239Earth ScienceDissolutionFertilizerMineral stabilityStability of Mica, K-feldspar and apatite in water, organic matters and citric acidConference PaperRG/2005/EB/01FR 1567