Somasiri, L.L.W.2014-07-012014-07-011996Seminar organised by the Lanka Phosphate Ltd, Sri Lanka, 1996https://dl-cri.nsf.gov.lk//handle/1/4101enFertilizersEppawela appatiteFertilizer sourcesSri LankaUse of Eppawala Appatite in coconutOther