Wijewardena, J.D.H.2014-12-162014-12-161999Journal of the Soil Science Society of Sri Lanka, 11:p.17-21https://dl.nsf.gov.lk/handle/1/16274AgricultureEppawala rock phosphateImported rock phosphateTriple superphosphateVegetable productionUpcountryEffect of triple superphosphate and rock phosphate combinations on vegetable production in the upcountry of Sri LankaArticle