Yogarathnam ,N.Perera, M.A.2012-06-252012-06-251981Journal of the Rubber Research Institute of Sri Lanka59pp.20-30https://dl.nsf.gov.lk/handle/1/8790AgricultureRubberNitrogen fertilizersPlant growthYieldSoil propertiesUrea as a nitrogen fertilizer for rubber plantations in sri lanka II.. agronomic investigationsArticle