Bulletin of the Rubber Research Institute of Sri Lanka
Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/9047
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Item Use of grass root level information for effective policy making and extension planning. experiences from the smallholder rubber sector(Rubber Research Institute of Sri Lanka. Agalawatta, 2009) Wijesuriya, W.; Dissanayake, A.Item Physical, chemical and mineralogical characteristics of commercially available Eppawela and Gafsa rock phosphates(Rubber Research Institute of Sri Lanka. Agalawatta, 1995) Dissanayake, A.; Jayalath, C.Physical, chemical and mineralogical characteristics of commercially available Eppawela rock phosphate (ERP) was compared with a well known rock phosphate, Gasfa from Tunisia. The phosphate content of Eppawela material was low, around 16% and is two times lesser than Gasfa. Also, the extractable P in ERP was two times lesser than that of Gasfa, indicating its inferiority as a P source. A high amount of silica was present in the Eppawela material as an impurity and it therefore requires to ensure the quality control measures in a systematic way before it is marketed.