1.5 scope of research, This research study Study of reducing nitrogen and phosphorus in drainage in the reservoir. By using two trees, Palm in the country, Thailand is vetiver group include species, Surat Thani. Kamphaeng Phet 2, 3 and 5 in honour of Sri Lanka are Songkhla species groups include vetiver semi-evergreen varieties in Ratchaburi. Kamphaeng Phet and Nakhon sawan, Prachuab khiri Khan et 1 5 species in concrete pond experiment measured the growth rate and nitrogen and phosphorus absorption rate by selected varieties that grow best in the floating Island, a prototype system of 5 Islands, in comparison with the naked island.
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