Abeykoon, V.2016-07-042016-07-041989National Symposium on "The Eppawala Phosphate Deposit - Recent Advances in Knowledge":p.14-15https://dl-ifs.nsf.gov.lk/handle/1/1500Effectiveness of partially acidulated phosphate rock (PAPR) prepared from Eppawala rock phosphate as a P fertilizerArticle