Cooray, P.I.Weerasuriya, T.J.Deturck, P.2015-07-072015-07-071992Journal of the Geological Society of Sri Lanka, 4:p.69-75https://dl-ifs.nsf.gov.lk/handle/1/411AgricultureEffect of acidulated pegmatitic mica on growth and yield of rice and soil solution K, Mg, CaArticle