Hadisubroto,-I. A trial improvement on coral reef in Jepara. REPORT-OF-THE-WORKSHOP-ON-ARTIFICIAL-REEFS-DEVELOPMENT- AND-MANAGEMENT.-PENANG,-MALAYSIA,-13-18-SEPTEMBER-1988. 1988. pp. 93-96. Details are given of a study conducted in Indonesia to introduce methods of improving damaged coral reef areas to promote increase in productivity. Concrete baskets were used to transplant several coral genera to damaged reef areas. Findings showed that from 30 pieces of concrete baskets located in 3 places along the Jepara Peninsula of Central Java several general showed a higher growth rate, especially Acropora .